As outras colunas da tabela contêm mais informações sobre cada flag do AlloyDB Omni:
Clique no nome de uma flag para conferir as instruções de uso.
A coluna Valor padrão mostra o valor que o AlloyDB Omni define para essa flag em uma nova instância, a menos que você especifique um valor diferente ao criar a instância.
Padrão padrão indica que a flag tem um valor padrão que não é definido pelo AlloyDB Omni. Para saber mais, clique no nome da flag.
Na coluna Reinicialização necessária, Sim indica que
é preciso reiniciar o AlloyDB Omni ao definir, remover ou
modificar a flag na instância. O valor da flag continua na instância até ele ser modificado novamente.
Na coluna Restrições de réplica, Sim indica as seguintes restrições sobre como usar a flag:
Antes de definir essa flag na instância principal do cluster, defina-a em cada uma das instâncias de réplica do cluster.
Se a instância principal tiver essa flag definida, o valor dela em qualquer instância de réplica precisará ser igual ou maior que o valor da instância principal.
Flags padrão do PostgreSQL que precisam ser reiniciadas
As flags padrão do PostgreSQL a seguir exigem uma reinicialização do AlloyDB Omni quando você define, remove ou modifica a flag na instância. O valor da flag continua na instância até ele ser modificado novamente.
[[["Fácil de entender","easyToUnderstand","thumb-up"],["Meu problema foi resolvido","solvedMyProblem","thumb-up"],["Outro","otherUp","thumb-up"]],[["Difícil de entender","hardToUnderstand","thumb-down"],["Informações incorretas ou exemplo de código","incorrectInformationOrSampleCode","thumb-down"],["Não contém as informações/amostras de que eu preciso","missingTheInformationSamplesINeed","thumb-down"],["Problema na tradução","translationIssue","thumb-down"],["Outro","otherDown","thumb-down"]],["Última atualização 2025-09-03 UTC."],[[["\u003cp\u003eThis page details the database flags supported by AlloyDB Omni, which are used for operations like adjusting PostgreSQL parameters, configuring options, and tuning instances.\u003c/p\u003e\n"],["\u003cp\u003eEach flag in the table has a default value, which AlloyDB Omni sets in a new instance unless a different value is specified during creation; some flags have a "Standard default," indicating a value not set by AlloyDB Omni.\u003c/p\u003e\n"],["\u003cp\u003eThe "Restart required" column indicates whether AlloyDB Omni needs to be restarted after setting, removing, or modifying a flag, and if a flag requires a restart, it persists until modified.\u003c/p\u003e\n"],["\u003cp\u003eThe "Replica restrictions" column specifies whether a flag must be set on all replica instances before being set on the primary, or if the value on the replica must be equal to or greater than the primary instance's value.\u003c/p\u003e\n"],["\u003cp\u003eClicking on a flag name in the table provides more detailed information about its usage and specific configurations.\u003c/p\u003e\n"]]],[],null,["# Supported database flags\n\nSelect a documentation version: 15.7.1keyboard_arrow_down\n\n- [Current (16.8.0)](/alloydb/omni/current/docs/reference/database-flags)\n- [16.8.0](/alloydb/omni/16.8.0/docs/reference/database-flags)\n- [16.3.0](/alloydb/omni/16.3.0/docs/reference/database-flags)\n- [15.12.0](/alloydb/omni/15.12.0/docs/reference/database-flags)\n- [15.7.1](/alloydb/omni/15.7.1/docs/reference/database-flags)\n- [15.7.0](/alloydb/omni/15.7.0/docs/reference/database-flags)\n\n\u003cbr /\u003e\n\nAlloyDB Omni supports all database flags provided by standard [PostgreSQL](https://www.postgresql.org/docs/15/index.html) versions. This page lists the database flags that AlloyDB Omni provides in addition to the standard database flags.\n\n\u003cbr /\u003e\n\nYou use database flags for many operations, including adjusting PostgreSQL\nparameters, adjusting options, and configuring and tuning instances.\n\nFor more information about setting database flags in\nAlloyDB Omni, see [Configure AlloyDB Omni database flags](/alloydb/omni/15.7.1/docs/configure-database-flags).\n\nAlloyDB Omni flags\n------------------\n\nThe table's other columns contain additional information\nabout each AlloyDB Omni flag:\n\n- Click a flag name to see its usage instructions.\n\n- The **Default value** column displays the value that\n AlloyDB Omni sets for this flag in a new instance, unless you specify a different value when creating the instance.\n\n **Standard default** indicates that the flag has a default value that's not\n set by AlloyDB Omni. To learn more, click the flag's name.\n- In the **Restart required** column, **Yes** indicates that\n you need to restart AlloyDB Omni when you set, remove, or\n modify the flag on the instance. The flag's value persists for the\n instance until you modify it again.\n\n- In the **Replica restrictions** column, **Yes** indicates the following\n restrictions on how you can use the flag:\n\n - Before setting this flag on your cluster's primary instance, set\n the flag on each of your cluster's replica instances.\n\n - If the primary instance has this flag set, then the value of this\n flag on any replica instance must be equal to or greater\n than the primary instance's value for this flag.\n\n \u003cbr /\u003e\n\n[A](#postgres-a) \\| [C](#postgres-c) \\| [D](#postgres-d) \\| [E](#postgres-e) \\| [F](#postgres-f) \\| [G](#postgres-g) \\| [H](#postgres-h) \\| [I](#postgres-i) \\| [J](#postgres-j) \\| [L](#postgres-l) \\| [M](#postgres-m) \\| [O](#postgres-o) \\| [P](#postgres-p) \\| [R](#postgres-r) \\| [S](#postgres-s) \\| [T](#postgres-t) \\| [V](#postgres-v) \\| [W](#postgres-w)\n\nStandard PostgreSQL flags that need restart\n-------------------------------------------\n\nThe following standard PostgreSQL flags require a restart of AlloyDB Omni when you set, remove, or modify the flag on the instance. The flag's value persists for the instance until you modify it again.\n\n- [autovacuum_freeze_max_age](https://www.postgresql.org/docs/15/runtime-config-autovacuum.html#GUC-AUTOVACUUM-FREEZE-MAX-AGE)\n- [autovacuum_max_workers](https://www.postgresql.org/docs/15/runtime-config-autovacuum.html#GUC-AUTOVACUUM-MAX-WORKERS)\n- [autovacuum_multixact_freeze_max_age](https://www.postgresql.org/docs/15/runtime-config-autovacuum.html#GUC-AUTOVACUUM-MULTIXACT-FREEZE-MAX-AGE)\n- [cron.database_name](https://github.com/citusdata/pg_cron#what-is-pg_cron)\n- [cron.log_run](https://github.com/citusdata/pg_cron/blob/main/src/pg_cron.c)\n- [cron.log_statement](https://github.com/citusdata/pg_cron/blob/main/src/pg_cron.c)\n- [cron.max_running_jobs](https://github.com/citusdata/pg_cron/blob/main/src/pg_cron.c)\n- [max_connections](https://www.postgresql.org/docs/15/runtime-config-connection.html#GUC-MAX-CONNECTIONS)\n- [max_locks_per_transaction](https://www.postgresql.org/docs/15/runtime-config-locks.html#GUC-MAX-LOCKS-PER-TRANSACTION)\n- [max_logical_replication_workers](https://www.postgresql.org/docs/15/runtime-config-replication.html#GUC-MAX-LOGICAL-REPLICATION-WORKERS)\n- [max_pred_locks_per_page](https://www.postgresql.org/docs/15/runtime-config-locks.html#GUC-MAX-PRED-LOCKS-PER-PAGE)\n- [max_pred_locks_per_relation](https://www.postgresql.org/docs/15/runtime-config-locks.html#GUC-MAX-PRED-LOCKS-PER-RELATION)\n- [max_pred_locks_per_transaction](https://www.postgresql.org/docs/15/runtime-config-locks.html#GUC-MAX-PRED-LOCKS-PER-TRANSACTION)\n- [max_prepared_transactions](https://www.postgresql.org/docs/15/runtime-config-resource.html#GUC-MAX-PREPARED-TRANSACTIONS)\n- [max_replication_slots](https://www.postgresql.org/docs/15/runtime-config-replication.html#GUC-MAX-REPLICATION-SLOTS)\n- [max_wal_senders](https://www.postgresql.org/docs/15/runtime-config-replication.html#GUC-MAX-WAL-SENDERS)\n- [max_worker_processes](https://www.postgresql.org/docs/15/runtime-config-resource.html#GUC-MAX-WORKER-PROCESSES)\n- [old_snapshot_threshold](https://www.postgresql.org/docs/15/runtime-config-resource.html#GUC-OLD-SNAPSHOT-THRESHOLD)\n- [pg_stat_statements.max](https://www.postgresql.org/docs/15/pgstatstatements.html#id-1.11.7.38.8)\n- [pglogical.batch_inserts](https://github.com/2ndQuadrant/pglogical#configuration-options)\n- [pglogical.synchronous_commit](https://github.com/2ndQuadrant/pglogical#synchronous-replication)\n- [pglogical.use_spi](https://github.com/2ndQuadrant/pglogical#configuration-options)\n- [shared_buffers](https://www.postgresql.org/docs/15/runtime-config-resource.html#GUC-SHARED-BUFFERS)\n- [track_activity_query_size](https://www.postgresql.org/docs/15/runtime-config-statistics.html#GUC-TRACK-ACTIVITY-QUERY-SIZE)\n- [track_commit_timestamp](https://www.postgresql.org/docs/15/runtime-config-replication.html#GUC-TRACK-COMMIT-TIMESTAMP)\n- [wal_buffers](https://www.postgresql.org/docs/15/runtime-config-wal.html#GUC-WAL-BUFFERS)"]]