Cluster Settings

Cluster settings apply to all nodes of a CockroachDB cluster and control, for example, whether or not to share diagnostic details with Cockroach Labs as well as advanced options for debugging and cluster tuning.

They can be updated anytime after a cluster has been started, but only by a member of the admin role, to which the root user belongs by default.

Settings

Setting	Type	Default	Description
admission.disk_bandwidth_tokens.elastic.enabled	boolean	true	when true, and provisioned bandwidth for the disk corresponding to a store is configured, tokens for elastic work will be limited if disk bandwidth becomes a bottleneck
admission.epoch_lifo.enabled	boolean	false	when true, epoch-LIFO behavior is enabled when there is significant delay in admission
admission.epoch_lifo.epoch_closing_delta_duration	duration	5ms	the delta duration before closing an epoch, for epoch-LIFO admission control ordering
admission.epoch_lifo.epoch_duration	duration	100ms	the duration of an epoch, for epoch-LIFO admission control ordering
admission.epoch_lifo.queue_delay_threshold_to_switch_to_lifo	duration	105ms	the queue delay encountered by a (tenant,priority) for switching to epoch-LIFO ordering
admission.kv.enabled	boolean	true	when true, work performed by the KV layer is subject to admission control
admission.kv.stores.tenant_weights.enabled	boolean	false	when true, tenant weights are enabled for KV-stores admission control
admission.kv.tenant_weights.enabled	boolean	false	when true, tenant weights are enabled for KV admission control
admission.sql_kv_response.enabled	boolean	true	when true, work performed by the SQL layer when receiving a KV response is subject to admission control
admission.sql_sql_response.enabled	boolean	true	when true, work performed by the SQL layer when receiving a DistSQL response is subject to admission control
bulkio.backup.deprecated_full_backup_with_subdir.enabled	boolean	false	when true, a backup command with a user specified subdirectory will create a full backup at the subdirectory if no backup already exists at that subdirectory.
bulkio.backup.file_size	byte size	128 MiB	target size for individual data files produced during BACKUP
bulkio.backup.read_timeout	duration	5m0s	amount of time after which a read attempt is considered timed out, which causes the backup to fail
bulkio.backup.read_with_priority_after	duration	1m0s	amount of time since the read-as-of time above which a BACKUP should use priority when retrying reads
bulkio.stream_ingestion.minimum_flush_interval	duration	5s	the minimum timestamp between flushes; flushes may still occur if internal buffers fill up
changefeed.backfill.scan_request_size	integer	524288	the maximum number of bytes returned by each scan request
changefeed.balance_range_distribution.enable	boolean	false	if enabled, the ranges are balanced equally among all nodes
changefeed.batch_reduction_retry_enabled	boolean	false	if true, kafka changefeeds upon erroring on an oversized batch will attempt to resend the messages with progressively lower batch sizes
changefeed.event_consumer_worker_queue_size	integer	16	if changefeed.event_consumer_workers is enabled, this setting sets the maxmimum number of events which a worker can buffer
changefeed.event_consumer_workers	integer	0	the number of workers to use when processing events: <0 disables, 0 assigns a reasonable default, >0 assigns the setting value. for experimental/core changefeeds and changefeeds using parquet format, this is disabled
changefeed.fast_gzip.enabled	boolean	true	use fast gzip implementation
changefeed.lagging_ranges_polling_interval	duration	1m0s	the polling rate at which lagging ranges are checked and corresponding metrics are updated. will be removed in v23.2 onwards
changefeed.lagging_ranges_threshold	duration	3m0s	specifies the duration by which a range must be lagging behind the present to be considered as 'lagging' behind in metrics. will be removed in v23.2 in favor of a changefeed option
changefeed.node_throttle_config	string		specifies node level throttling configuration for all changefeeeds
changefeed.schema_feed.read_with_priority_after	duration	1m0s	retry with high priority if we were not able to read descriptors for too long; 0 disables
cloudstorage.azure.concurrent_upload_buffers	integer	1	controls the number of concurrent buffers that will be used by the Azure client when uploading chunks.Each buffer can buffer up to cloudstorage.write_chunk.size of memory during an upload
cloudstorage.http.custom_ca	string		custom root CA (appended to system's default CAs) for verifying certificates when interacting with HTTPS storage
cloudstorage.timeout	duration	10m0s	the timeout for import/export storage operations
cluster.organization	string		organization name
cluster.preserve_downgrade_option	string		disable (automatic or manual) cluster version upgrade from the specified version until reset
diagnostics.active_query_dumps.enabled	boolean	true	experimental: enable dumping of anonymized active queries to disk when node is under memory pressure
diagnostics.forced_sql_stat_reset.interval	duration	2h0m0s	interval after which the reported SQL Stats are reset even if not collected by telemetry reporter. It has a max value of 24H.
diagnostics.reporting.enabled	boolean	true	enable reporting diagnostic metrics to cockroach labs
diagnostics.reporting.interval	duration	1h0m0s	interval at which diagnostics data should be reported
enterprise.license	string		the encoded cluster license
external.graphite.endpoint	string		if nonempty, push server metrics to the Graphite or Carbon server at the specified host:port
external.graphite.interval	duration	10s	the interval at which metrics are pushed to Graphite (if enabled)
feature.backup.enabled	boolean	true	set to true to enable backups, false to disable; default is true
feature.changefeed.enabled	boolean	true	set to true to enable changefeeds, false to disable; default is true
feature.export.enabled	boolean	true	set to true to enable exports, false to disable; default is true
feature.import.enabled	boolean	true	set to true to enable imports, false to disable; default is true
feature.restore.enabled	boolean	true	set to true to enable restore, false to disable; default is true
feature.schema_change.enabled	boolean	true	set to true to enable schema changes, false to disable; default is true
feature.stats.enabled	boolean	true	set to true to enable CREATE STATISTICS/ANALYZE, false to disable; default is true
jobs.retention_time	duration	336h0m0s	the amount of time to retain records for completed jobs before
kv.allocator.lease_rebalance_threshold	float	0.05	minimum fraction away from the mean a store's lease count can be before it is considered for lease-transfers
kv.allocator.load_based_lease_rebalancing.enabled	boolean	true	set to enable rebalancing of range leases based on load and latency
kv.allocator.load_based_rebalancing	enumeration	leases and replicas	whether to rebalance based on the distribution of QPS across stores [off = 0, leases = 1, leases and replicas = 2]
kv.allocator.load_based_rebalancing_interval	duration	1m0s	the rough interval at which each store will check for load-based lease / replica rebalancing opportunities
kv.allocator.qps_rebalance_threshold	float	0.1	minimum fraction away from the mean a store's QPS (such as queries per second) can be before it is considered overfull or underfull
kv.allocator.range_rebalance_threshold	float	0.05	minimum fraction away from the mean a store's range count can be before it is considered overfull or underfull
kv.bulk_io_write.max_rate	byte size	1.0 TiB	the rate limit (bytes/sec) to use for writes to disk on behalf of bulk io ops
kv.bulk_sst.max_allowed_overage	byte size	64 MiB	if positive, allowed size in excess of target size for SSTs from export requests; export requests (i.e. BACKUP) may buffer up to the sum of kv.bulk_sst.target_size and kv.bulk_sst.max_allowed_overage in memory
kv.bulk_sst.target_size	byte size	16 MiB	target size for SSTs emitted from export requests; export requests (i.e. BACKUP) may buffer up to the sum of kv.bulk_sst.target_size and kv.bulk_sst.max_allowed_overage in memory
kv.closed_timestamp.follower_reads_enabled	boolean	true	allow (all) replicas to serve consistent historical reads based on closed timestamp information
kv.log_range_and_node_events.enabled	boolean	true	set to true to transactionally log range events (e.g., split, merge, add/remove voter/non-voter) into system.rangelogand node join and restart events into system.eventolog
kv.protectedts.reconciliation.interval	duration	5m0s	the frequency for reconciling jobs with protected timestamp records
kv.range_split.by_load_enabled	boolean	true	allow automatic splits of ranges based on where load is concentrated
kv.range_split.load_qps_threshold	integer	2500	the QPS over which, the range becomes a candidate for load based splitting
kv.rangefeed.enabled	boolean	false	if set, rangefeed registration is enabled
kv.rangefeed.range_stuck_threshold	duration	1m0s	restart rangefeeds if they don't emit anything for the specified threshold; 0 disables (kv.closed_timestamp.side_transport_interval takes precedence)
kv.replica_circuit_breaker.slow_replication_threshold	duration	1m0s	duration after which slow proposals trip the per-Replica circuit breaker (zero duration disables breakers)
kv.replica_stats.addsst_request_size_factor	integer	50000	the divisor that is applied to addsstable request sizes, then recorded in a leaseholders QPS; 0 means all requests are treated as cost 1
kv.replication_reports.interval	duration	1m0s	the frequency for generating the replication_constraint_stats, replication_stats_report and replication_critical_localities reports (set to 0 to disable)
kv.snapshot_rebalance.max_rate	byte size	32 MiB	the rate limit (bytes/sec) to use for rebalance and upreplication snapshots
kv.snapshot_recovery.max_rate	byte size	32 MiB	the rate limit (bytes/sec) to use for recovery snapshots
kv.transaction.max_intents_bytes	integer	4194304	maximum number of bytes used to track locks in transactions
kv.transaction.max_refresh_spans_bytes	integer	4194304	maximum number of bytes used to track refresh spans in serializable transactions
kv.transaction.reject_over_max_intents_budget.enabled	boolean	false	if set, transactions that exceed their lock tracking budget (kv.transaction.max_intents_bytes) are rejected instead of having their lock spans imprecisely compressed
kvadmission.store.provisioned_bandwidth	byte size	0 B	if set to a non-zero value, this is used as the provisioned bandwidth (in bytes/s), for each store. It can be over-ridden on a per-store basis using the --store flag
schedules.backup.gc_protection.enabled	boolean	true	enable chaining of GC protection across backups run as part of a schedule
security.ocsp.mode	enumeration	off	use OCSP to check whether TLS certificates are revoked. If the OCSP server is unreachable, in strict mode all certificates will be rejected and in lax mode all certificates will be accepted. [off = 0, lax = 1, strict = 2]
security.ocsp.timeout	duration	3s	timeout before considering the OCSP server unreachable
server.auth_log.sql_connections.enabled	boolean	false	if set, log SQL client connect and disconnect events (note: may hinder performance on loaded nodes)
server.auth_log.sql_sessions.enabled	boolean	false	if set, log SQL session login/disconnection events (note: may hinder performance on loaded nodes)
server.authentication_cache.enabled	boolean	true	enables a cache used during authentication to avoid lookups to system tables when retrieving per-user authentication-related information
server.child_metrics.enabled	boolean	false	enables the exporting of child metrics, additional prometheus time series with extra labels
server.client_cert_expiration_cache.capacity	integer	1000	the maximum number of client cert expirations stored
server.clock.forward_jump_check_enabled	boolean	false	if enabled, forward clock jumps > max_offset/2 will cause a panic
server.clock.persist_upper_bound_interval	duration	0s	the interval between persisting the wall time upper bound of the clock. The clock does not generate a wall time greater than the persisted timestamp and will panic if it sees a wall time greater than this value. When cockroach starts, it waits for the wall time to catch-up till this persisted timestamp. This guarantees monotonic wall time across server restarts. Not setting this or setting a value of 0 disables this feature.
server.consistency_check.max_rate	byte size	8.0 MiB	the rate limit (bytes/sec) to use for consistency checks; used in conjunction with server.consistency_check.interval to control the frequency of consistency checks. Note that setting this too high can negatively impact performance.
server.eventlog.enabled	boolean	true	if set, logged notable events are also stored in the table system.eventlog
server.eventlog.ttl	duration	2160h0m0s	if nonzero, entries in system.eventlog older than this duration are deleted every 10m0s. Should not be lowered below 24 hours.
server.host_based_authentication.configuration	string		host-based authentication configuration to use during connection authentication
server.hsts.enabled	boolean	false	if true, HSTS headers will be sent along with all HTTP requests. The headers will contain a max-age setting of one year. Browsers honoring the header will always use HTTPS to access the DB Console. Ensure that TLS is correctly configured prior to enabling.
server.http.base_path	string	/	path to redirect the user to upon succcessful login
server.identity_map.configuration	string		system-identity to database-username mappings
server.max_connections_per_gateway	integer	-1	the maximum number of non-superuser SQL connections per gateway allowed at a given time (note: this will only limit future connection attempts and will not affect already established connections). Negative values result in unlimited number of connections. Superusers are not affected by this limit.
server.oidc_authentication.autologin	boolean	false	if true, logged-out visitors to the DB Console will be automatically redirected to the OIDC login endpoint
server.oidc_authentication.button_text	string	Login with your OIDC provider	text to show on button on DB Console login page to login with your OIDC provider (only shown if OIDC is enabled)
server.oidc_authentication.claim_json_key	string		sets JSON key of principal to extract from payload after OIDC authentication completes (usually email or sid)
server.oidc_authentication.client_id	string		sets OIDC client id
server.oidc_authentication.client_secret	string		sets OIDC client secret
server.oidc_authentication.enabled	boolean	false	enables or disabled OIDC login for the DB Console
server.oidc_authentication.principal_regex	string	(.+)	regular expression to apply to extracted principal (see claim_json_key setting) to translate to SQL user (golang regex format, must include 1 grouping to extract)
server.oidc_authentication.provider_url	string		sets OIDC provider URL ({provider_url}/.well-known/openid-configuration must resolve)
server.oidc_authentication.redirect_url	string	https://localhost:8080/oidc/v1/callback	sets OIDC redirect URL via a URL string or a JSON string containing a required `redirect_urls` key with an object that maps from region keys to URL strings (URLs should point to your load balancer and must route to the path /oidc/v1/callback)
server.oidc_authentication.scopes	string	openid	sets OIDC scopes to include with authentication request (space delimited list of strings, required to start with `openid`)
server.rangelog.ttl	duration	720h0m0s	if nonzero, range log entries older than this duration are deleted every 10m0s. Should not be lowered below 24 hours.
server.secondary_tenants.redact_trace.enabled	boolean	true	controls if server side traces are redacted for tenant operations
server.shutdown.connection_wait	duration	0s	the maximum amount of time a server waits for all SQL connections to be closed before proceeding with a drain. (note that the --drain-wait parameter for cockroach node drain may need adjustment after changing this setting)
server.shutdown.drain_wait	duration	0s	the amount of time a server waits in an unready state before proceeding with a drain (note that the --drain-wait parameter for cockroach node drain may need adjustment after changing this setting. --drain-wait is to specify the duration of the whole draining process, while server.shutdown.drain_wait is to set the wait time for health probes to notice that the node is not ready.)
server.shutdown.lease_transfer_wait	duration	5s	the timeout for a single iteration of the range lease transfer phase of draining (note that the --drain-wait parameter for cockroach node drain may need adjustment after changing this setting)
server.shutdown.query_wait	duration	10s	the timeout for waiting for active queries to finish during a drain (note that the --drain-wait parameter for cockroach node drain may need adjustment after changing this setting)
server.time_until_store_dead	duration	5m0s	the time after which if there is no new gossiped information about a store, it is considered dead
server.user_login.cert_password_method.auto_scram_promotion.enabled	boolean	true	whether to automatically promote cert-password authentication to use SCRAM
server.user_login.downgrade_scram_stored_passwords_to_bcrypt.enabled	boolean	true	if server.user_login.password_encryption=crdb-bcrypt, this controls whether to automatically re-encode stored passwords using scram-sha-256 to crdb-bcrypt
server.user_login.min_password_length	integer	1	the minimum length accepted for passwords set in cleartext via SQL. Note that a value lower than 1 is ignored: passwords cannot be empty in any case.
server.user_login.password_encryption	enumeration	scram-sha-256	which hash method to use to encode cleartext passwords passed via ALTER/CREATE USER/ROLE WITH PASSWORD [crdb-bcrypt = 2, scram-sha-256 = 3]
server.user_login.password_hashes.default_cost.crdb_bcrypt	integer	10	the hashing cost to use when storing passwords supplied as cleartext by SQL clients with the hashing method crdb-bcrypt (allowed range: 4-31)
server.user_login.password_hashes.default_cost.scram_sha_256	integer	10610	the hashing cost to use when storing passwords supplied as cleartext by SQL clients with the hashing method scram-sha-256 (allowed range: 4096-240000000000)
server.user_login.rehash_scram_stored_passwords_on_cost_change.enabled	boolean	true	if server.user_login.password_hashes.default_cost.scram_sha_256 differs from, the cost in a stored hash, this controls whether to automatically re-encode stored passwords using scram-sha-256 with the new default cost
server.user_login.timeout	duration	10s	timeout after which client authentication times out if some system range is unavailable (0 = no timeout)
server.user_login.upgrade_bcrypt_stored_passwords_to_scram.enabled	boolean	true	if server.user_login.password_encryption=scram-sha-256, this controls whether to automatically re-encode stored passwords using crdb-bcrypt to scram-sha-256
server.web_session.auto_logout.timeout	duration	168h0m0s	the duration that web sessions will survive before being periodically purged, since they were last used
server.web_session.purge.max_deletions_per_cycle	integer	10	the maximum number of old sessions to delete for each purge
server.web_session.purge.period	duration	1h0m0s	the time until old sessions are deleted
server.web_session.purge.ttl	duration	1h0m0s	if nonzero, entries in system.web_sessions older than this duration are periodically purged
server.web_session_timeout	duration	168h0m0s	the duration that a newly created web session will be valid
sql.auth.change_own_password.enabled	boolean	false	controls whether a user is allowed to change their own password, even if they have no other privileges
sql.auth.modify_cluster_setting_applies_to_all.enabled	boolean	true	a bool which indicates whether MODIFYCLUSTERSETTING is able to set all cluster settings or only settings with the sql.defaults prefix
sql.auth.resolve_membership_single_scan.enabled	boolean	true	determines whether to populate the role membership cache with a single scan
sql.closed_session_cache.capacity	integer	1000	the maximum number of sessions in the cache
sql.closed_session_cache.time_to_live	integer	3600	the maximum time to live, in seconds
sql.contention.event_store.capacity	byte size	64 MiB	the in-memory storage capacity per-node of contention event store
sql.contention.event_store.duration_threshold	duration	0s	minimum contention duration to cause the contention events to be collected into crdb_internal.transaction_contention_events
sql.contention.txn_id_cache.max_size	byte size	64 MiB	the maximum byte size TxnID cache will use (set to 0 to disable)
sql.cross_db_fks.enabled	boolean	false	if true, creating foreign key references across databases is allowed
sql.cross_db_sequence_owners.enabled	boolean	false	if true, creating sequences owned by tables from other databases is allowed
sql.cross_db_sequence_references.enabled	boolean	false	if true, sequences referenced by tables from other databases are allowed
sql.cross_db_views.enabled	boolean	false	if true, creating views that refer to other databases is allowed
sql.defaults.cost_scans_with_default_col_size.enabled	boolean	false	setting to true uses the same size for all columns to compute scan cost This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.datestyle	enumeration	iso, mdy	default value for DateStyle session setting [iso, mdy = 0, iso, dmy = 1, iso, ymd = 2] This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.default_hash_sharded_index_bucket_count	integer	16	used as bucket count if bucket count is not specified in hash sharded index definition This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.default_int_size	integer	8	the size, in bytes, of an INT type This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.disallow_full_table_scans.enabled	boolean	false	setting to true rejects queries that have planned a full table scan This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.distsql	enumeration	auto	default distributed SQL execution mode [off = 0, auto = 1, on = 2, always = 3] This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.experimental_alter_column_type.enabled	boolean	false	default value for experimental_alter_column_type session setting; enables the use of ALTER COLUMN TYPE for general conversions This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.experimental_distsql_planning	enumeration	off	default experimental_distsql_planning mode; enables experimental opt-driven DistSQL planning [off = 0, on = 1] This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.experimental_enable_unique_without_index_constraints.enabled	boolean	false	default value for experimental_enable_unique_without_index_constraints session setting;disables unique without index constraints by default This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.experimental_implicit_column_partitioning.enabled	boolean	false	default value for experimental_enable_temp_tables; allows for the use of implicit column partitioning This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.experimental_stream_replication.enabled	boolean	false	default value for experimental_stream_replication session setting;enables the ability to setup a replication stream This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.experimental_temporary_tables.enabled	boolean	false	default value for experimental_enable_temp_tables; allows for use of temporary tables by default This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.foreign_key_cascades_limit	integer	10000	default value for foreign_key_cascades_limit session setting; limits the number of cascading operations that run as part of a single query This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.idle_in_session_timeout	duration	0s	default value for the idle_in_session_timeout; default value for the idle_in_session_timeout session setting; controls the duration a session is permitted to idle before the session is terminated; if set to 0, there is no timeout This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.idle_in_transaction_session_timeout	duration	0s	default value for the idle_in_transaction_session_timeout; controls the duration a session is permitted to idle in a transaction before the session is terminated; if set to 0, there is no timeout This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.implicit_select_for_update.enabled	boolean	true	default value for enable_implicit_select_for_update session setting; enables FOR UPDATE locking during the row-fetch phase of mutation statements This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.insert_fast_path.enabled	boolean	true	default value for enable_insert_fast_path session setting; enables a specialized insert path This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.intervalstyle	enumeration	postgres	default value for IntervalStyle session setting [postgres = 0, iso_8601 = 1, sql_standard = 2] This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.large_full_scan_rows	float	1000	default value for large_full_scan_rows session setting which determines the maximum table size allowed for a full scan when disallow_full_table_scans is set to true This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.locality_optimized_partitioned_index_scan.enabled	boolean	true	default value for locality_optimized_partitioned_index_scan session setting; enables searching for rows in the current region before searching remote regions This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.lock_timeout	duration	0s	default value for the lock_timeout; default value for the lock_timeout session setting; controls the duration a query is permitted to wait while attempting to acquire a lock on a key or while blocking on an existing lock in order to perform a non-locking read on a key; if set to 0, there is no timeout This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.on_update_rehome_row.enabled	boolean	true	default value for on_update_rehome_row; enables ON UPDATE rehome_row() expressions to trigger on updates This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.optimizer_use_histograms.enabled	boolean	true	default value for optimizer_use_histograms session setting; enables usage of histograms in the optimizer by default This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.optimizer_use_multicol_stats.enabled	boolean	true	default value for optimizer_use_multicol_stats session setting; enables usage of multi-column stats in the optimizer by default This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.override_alter_primary_region_in_super_region.enabled	boolean	false	default value for override_alter_primary_region_in_super_region; allows for altering the primary region even if the primary region is a member of a super region This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.override_multi_region_zone_config.enabled	boolean	false	default value for override_multi_region_zone_config; allows for overriding the zone configs of a multi-region table or database This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.prefer_lookup_joins_for_fks.enabled	boolean	false	default value for prefer_lookup_joins_for_fks session setting; causes foreign key operations to use lookup joins when possible This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.primary_region	string		if not empty, all databases created without a PRIMARY REGION will implicitly have the given PRIMARY REGION This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.reorder_joins_limit	integer	8	default number of joins to reorder This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.require_explicit_primary_keys.enabled	boolean	false	default value for requiring explicit primary keys in CREATE TABLE statements This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.results_buffer.size	byte size	16 KiB	default size of the buffer that accumulates results for a statement or a batch of statements before they are sent to the client. This can be overridden on an individual connection with the 'results_buffer_size' parameter. Note that auto-retries generally only happen while no results have been delivered to the client, so reducing this size can increase the number of retriable errors a client receives. On the other hand, increasing the buffer size can increase the delay until the client receives the first result row. Updating the setting only affects new connections. Setting to 0 disables any buffering. This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.serial_normalization	enumeration	rowid	default handling of SERIAL in table definitions [rowid = 0, virtual_sequence = 1, sql_sequence = 2, sql_sequence_cached = 3, unordered_rowid = 4] This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.statement_timeout	duration	0s	default value for the statement_timeout; default value for the statement_timeout session setting; controls the duration a query is permitted to run before it is canceled; if set to 0, there is no timeout This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.stub_catalog_tables.enabled	boolean	true	default value for stub_catalog_tables session setting This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.super_regions.enabled	boolean	false	default value for enable_super_regions; allows for the usage of super regions This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.transaction_rows_read_err	integer	0	the limit for the number of rows read by a SQL transaction which - once exceeded - will fail the transaction (or will trigger a logging event to SQL_INTERNAL_PERF for internal transactions); use 0 to disable This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.transaction_rows_read_log	integer	0	the threshold for the number of rows read by a SQL transaction which - once exceeded - will trigger a logging event to SQL_PERF (or SQL_INTERNAL_PERF for internal transactions); use 0 to disable This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.transaction_rows_written_err	integer	0	the limit for the number of rows written by a SQL transaction which - once exceeded - will fail the transaction (or will trigger a logging event to SQL_INTERNAL_PERF for internal transactions); use 0 to disable This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.transaction_rows_written_log	integer	0	the threshold for the number of rows written by a SQL transaction which - once exceeded - will trigger a logging event to SQL_PERF (or SQL_INTERNAL_PERF for internal transactions); use 0 to disable This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.use_declarative_schema_changer	enumeration	on	default value for use_declarative_schema_changer session setting;disables new schema changer by default [off = 0, on = 1, unsafe = 2, unsafe_always = 3] This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.vectorize	enumeration	on	default vectorize mode [on = 0, on = 2, experimental_always = 3, off = 4] This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.defaults.zigzag_join.enabled	boolean	true	default value for enable_zigzag_join session setting; allows use of zig-zag join by default This cluster setting is being kept to preserve backwards-compatibility. This session variable default should now be configured using ALTER ROLE... SET
sql.distsql.max_running_flows	integer	-128	the value - when positive - used as is, or the value - when negative - multiplied by the number of CPUs on a node, to determine the maximum number of concurrent remote flows that can be run on the node
sql.distsql.temp_storage.workmem	byte size	64 MiB	maximum amount of memory in bytes a processor can use before falling back to temp storage
sql.guardrails.max_row_size_err	byte size	512 MiB	maximum size of row (or column family if multiple column families are in use) that SQL can write to the database, above which an error is returned; use 0 to disable
sql.guardrails.max_row_size_log	byte size	64 MiB	maximum size of row (or column family if multiple column families are in use) that SQL can write to the database, above which an event is logged to SQL_PERF (or SQL_INTERNAL_PERF if the mutating statement was internal); use 0 to disable
sql.hash_sharded_range_pre_split.max	integer	16	max pre-split ranges to have when adding hash sharded index to an existing table
sql.insights.anomaly_detection.enabled	boolean	true	enable per-fingerprint latency recording and anomaly detection
sql.insights.anomaly_detection.latency_threshold	duration	50ms	statements must surpass this threshold to trigger anomaly detection and identification
sql.insights.anomaly_detection.memory_limit	byte size	1.0 MiB	the maximum amount of memory allowed for tracking statement latencies
sql.insights.execution_insights_capacity	integer	1000	the size of the per-node store of execution insights
sql.insights.high_retry_count.threshold	integer	10	the number of retries a slow statement must have undergone for its high retry count to be highlighted as a potential problem
sql.insights.latency_threshold	duration	100ms	amount of time after which an executing statement is considered slow. Use 0 to disable.
sql.log.slow_query.experimental_full_table_scans.enabled	boolean	false	when set to true, statements that perform a full table/index scan will be logged to the slow query log even if they do not meet the latency threshold. Must have the slow query log enabled for this setting to have any effect.
sql.log.slow_query.internal_queries.enabled	boolean	false	when set to true, internal queries which exceed the slow query log threshold are logged to a separate log. Must have the slow query log enabled for this setting to have any effect.
sql.log.slow_query.latency_threshold	duration	0s	when set to non-zero, log statements whose service latency exceeds the threshold to a secondary logger on each node
sql.metrics.index_usage_stats.enabled	boolean	true	collect per index usage statistics
sql.metrics.max_mem_reported_stmt_fingerprints	integer	100000	the maximum number of reported statement fingerprints stored in memory
sql.metrics.max_mem_reported_txn_fingerprints	integer	100000	the maximum number of reported transaction fingerprints stored in memory
sql.metrics.max_mem_stmt_fingerprints	integer	100000	the maximum number of statement fingerprints stored in memory
sql.metrics.max_mem_txn_fingerprints	integer	100000	the maximum number of transaction fingerprints stored in memory
sql.metrics.statement_details.dump_to_logs	boolean	false	dump collected statement statistics to node logs when periodically cleared
sql.metrics.statement_details.enabled	boolean	true	collect per-statement query statistics
sql.metrics.statement_details.gateway_node.enabled	boolean	true	save the gateway node for each statement fingerprint. If false, the value will be stored as 0.
sql.metrics.statement_details.index_recommendation_collection.enabled	boolean	true	generate an index recommendation for each fingerprint ID
sql.metrics.statement_details.max_mem_reported_idx_recommendations	integer	5000	the maximum number of reported index recommendation info stored in memory
sql.metrics.statement_details.plan_collection.enabled	boolean	false	periodically save a logical plan for each fingerprint
sql.metrics.statement_details.plan_collection.period	duration	5m0s	the time until a new logical plan is collected
sql.metrics.statement_details.threshold	duration	0s	minimum execution time to cause statement statistics to be collected. If configured, no transaction stats are collected.
sql.metrics.transaction_details.enabled	boolean	true	collect per-application transaction statistics
sql.multiple_modifications_of_table.enabled	boolean	false	if true, allow statements containing multiple INSERT ON CONFLICT, UPSERT, UPDATE, or DELETE subqueries modifying the same table, at the risk of data corruption if the same row is modified multiple times by a single statement (multiple INSERT subqueries without ON CONFLICT cannot cause corruption and are always allowed)
sql.multiregion.drop_primary_region.enabled	boolean	true	allows dropping the PRIMARY REGION of a database if it is the last region
sql.notices.enabled	boolean	true	enable notices in the server/client protocol being sent
sql.optimizer.uniqueness_checks_for_gen_random_uuid.enabled	boolean	false	if enabled, uniqueness checks may be planned for mutations of UUID columns updated with gen_random_uuid(); otherwise, uniqueness is assumed due to near-zero collision probability
sql.schema.telemetry.recurrence	string	@weekly	cron-tab recurrence for SQL schema telemetry job
sql.spatial.experimental_box2d_comparison_operators.enabled	boolean	false	enables the use of certain experimental box2d comparison operators
sql.stats.automatic_collection.enabled	boolean	true	automatic statistics collection mode
sql.stats.automatic_collection.fraction_stale_rows	float	0.2	target fraction of stale rows per table that will trigger a statistics refresh
sql.stats.automatic_collection.min_stale_rows	integer	500	target minimum number of stale rows per table that will trigger a statistics refresh
sql.stats.cleanup.recurrence	string	@hourly	cron-tab recurrence for SQL Stats cleanup job
sql.stats.flush.enabled	boolean	true	if set, SQL execution statistics are periodically flushed to disk
sql.stats.flush.interval	duration	10m0s	the interval at which SQL execution statistics are flushed to disk, this value must be less than or equal to 1 hour
sql.stats.forecasts.enabled	boolean	true	when true, enables generation of statistics forecasts by default for all tables
sql.stats.histogram_buckets.count	integer	200	maximum number of histogram buckets to build during table statistics collection
sql.stats.histogram_collection.enabled	boolean	true	histogram collection mode
sql.stats.histogram_samples.count	integer	10000	number of rows sampled for histogram construction during table statistics collection
sql.stats.multi_column_collection.enabled	boolean	true	multi-column statistics collection mode
sql.stats.non_default_columns.min_retention_period	duration	24h0m0s	minimum retention period for table statistics collected on non-default columns
sql.stats.persisted_rows.max	integer	1000000	maximum number of rows of statement and transaction statistics that will be persisted in the system tables
sql.stats.post_events.enabled	boolean	false	if set, an event is logged for every CREATE STATISTICS job
sql.stats.response.max	integer	20000	the maximum number of statements and transaction stats returned in a CombinedStatements request
sql.stats.response.show_internal.enabled	boolean	false	controls if statistics for internal executions should be returned by the CombinedStatements and if internal sessions should be returned by the ListSessions endpoints. These endpoints are used to display statistics on the SQL Activity pages
sql.stats.system_tables.enabled	boolean	true	when true, enables use of statistics on system tables by the query optimizer
sql.stats.system_tables_autostats.enabled	boolean	true	when true, enables automatic collection of statistics on system tables
sql.telemetry.query_sampling.enabled	boolean	false	when set to true, executed queries will emit an event on the telemetry logging channel
sql.temp_object_cleaner.cleanup_interval	duration	30m0s	how often to clean up orphaned temporary objects
sql.temp_object_cleaner.wait_interval	duration	30m0s	how long after creation a temporary object will be cleaned up
sql.trace.log_statement_execute	boolean	false	set to true to enable logging of executed statements
sql.trace.session_eventlog.enabled	boolean	false	set to true to enable session tracing; note that enabling this may have a negative performance impact
sql.trace.stmt.enable_threshold	duration	0s	enables tracing on all statements; statements executing for longer than this duration will have their trace logged (set to 0 to disable); note that enabling this may have a negative performance impact; this setting applies to individual statements within a transaction and is therefore finer-grained than sql.trace.txn.enable_threshold
sql.trace.txn.enable_threshold	duration	0s	enables tracing on all transactions; transactions open for longer than this duration will have their trace logged (set to 0 to disable); note that enabling this may have a negative performance impact; this setting is coarser-grained than sql.trace.stmt.enable_threshold because it applies to all statements within a transaction as well as client communication (e.g. retries)
sql.ttl.default_delete_batch_size	integer	100	default amount of rows to delete in a single query during a TTL job
sql.ttl.default_delete_rate_limit	integer	0	default delete rate limit for all TTL jobs. Use 0 to signify no rate limit.
sql.ttl.default_select_batch_size	integer	500	default amount of rows to select in a single query during a TTL job
sql.ttl.job.enabled	boolean	true	whether the TTL job is enabled
sql.txn_fingerprint_id_cache.capacity	integer	100	the maximum number of txn fingerprint IDs stored
storage.max_sync_duration	duration	20s	maximum duration for disk operations; any operations that take longer than this setting trigger a warning log entry or process crash
storage.max_sync_duration.fatal.enabled	boolean	true	if true, fatal the process when a disk operation exceeds storage.max_sync_duration
timeseries.storage.enabled	boolean	true	if set, periodic timeseries data is stored within the cluster; disabling is not recommended unless you are storing the data elsewhere
timeseries.storage.resolution_10s.ttl	duration	240h0m0s	the maximum age of time series data stored at the 10 second resolution. Data older than this is subject to rollup and deletion.
timeseries.storage.resolution_30m.ttl	duration	2160h0m0s	the maximum age of time series data stored at the 30 minute resolution. Data older than this is subject to deletion.
trace.debug.enable	boolean	false	if set, traces for recent requests can be seen at https://<ui>/debug/requests
trace.jaeger.agent	string		the address of a Jaeger agent to receive traces using the Jaeger UDP Thrift protocol, as <host>:<port>. If no port is specified, 6381 will be used.
trace.opentelemetry.collector	string		address of an OpenTelemetry trace collector to receive traces using the otel gRPC protocol, as <host>:<port>. If no port is specified, 4317 will be used.
trace.snapshot.rate	duration	0s	if non-zero, interval at which background trace snapshots are captured
trace.span_registry.enabled	boolean	true	if set, ongoing traces can be seen at https://<ui>/#/debug/tracez
trace.zipkin.collector	string		the address of a Zipkin instance to receive traces, as <host>:<port>. If no port is specified, 9411 will be used.
version	version	22.2	set the active cluster version in the format '<major>.<minor>'

View current cluster settings

Use the SHOW CLUSTER SETTING statement.

Change a cluster setting

Use the SET CLUSTER SETTING statement.

Before changing a cluster setting, note the following:

• Changing a cluster setting is not instantaneous, as the change must be propagated to other nodes in the cluster.

• Do not change cluster settings while upgrading to a new version of CockroachDB. Wait until all nodes have been upgraded before you make the change.

See also

• SET CLUSTER SETTING
• SHOW CLUSTER SETTING
• Diagnostics Reporting
• Start a Node
• Use the Built-in SQL Client