![]() The given name can then be used with recovery_target_name to specify the point up to which recovery will proceed. Pg_create_restore_point ( name text ) → pg_lsnĬreates a named marker record in the write-ahead log that can later be used as a recovery target, and returns the corresponding write-ahead log location. Note that frequent calls to this function could incur significant overhead, because it may generate a large number of log messages. ![]() If there are more than 100 child contexts under the same parent, the first 100 child contexts are logged, along with a summary of the remaining contexts. LOG: level: 1 ErrorContext: 8192 total in 1 blocks 7928 free (3 chunks) 264 used LOG: level: 1 TransactionAbortContext: 32768 total in 1 blocks 32504 free (0 chunks) 264 used LOG: level: 1 smgr relation table: 16384 total in 2 blocks 4544 free (3 chunks) 11840 used LOG: level: 1 Operator class cache: 8192 total in 1 blocks 512 free (0 chunks) 7680 used LOG: level: 1 MessageContext: 16384 total in 2 blocks 5152 free (0 chunks) 11232 used LOG: level: 1 RowDescriptionContext: 8192 total in 1 blocks 6880 free (0 chunks) 1312 used LOG: level: 1 TopTransactionContext: 8192 total in 1 blocks 7720 free (1 chunks) 472 used LOG: level: 1 pgstat TabStatusArray lookup hash table: 8192 total in 1 blocks 1408 free (0 chunks) 6784 used LOG: level: 0 TopMemor圜ontext: 80800 total in 6 blocks 14432 free (5 chunks) 66368 used STATEMENT: SELECT pg_log_backend_memory_contexts(pg_backend_pid()) LOG: logging memory contexts of PID 10377 One message for each memory context will be logged. Postgres=# SELECT pg_log_backend_memory_contexts(pg_backend_pid()) Pg_log_backend_memory_contexts can be used to log the memory contexts of a backend process. The role of an active backend can be found from the usename column of the pg_stat_activity view. The process ID of an active backend can be found from the pid column of the pg_stat_activity view, or by listing the postgres processes on the server (using ps on Unix or the Task Manager on Windows). Pg_cancel_backend and pg_terminate_backend send signals ( SIGINT or SIGTERM respectively) to backend processes identified by process ID. On timeout, a warning is emitted and false is returned. If the process is terminated, the function returns true. If the timeout is specified (in milliseconds) and greater than zero, the function waits until the process is actually terminated or until the given time has passed. If timeout is not specified or zero, this function returns true whether the process actually terminates or not, indicating only that the sending of the signal was successful. This is also allowed if the calling role is a member of the role whose backend is being terminated or the calling role has privileges of pg_signal_backend, however only superusers can terminate superuser backends. Terminates the session whose backend process has the specified process ID. Pg_terminate_backend ( pid integer, timeout bigint DEFAULT 0 ) → boolean This works only when the built-in log collector is running, since otherwise there is no log-file manager subprocess. Signals the log-file manager to switch to a new output file immediately. (This is initiated by sending a SIGHUP signal to the postmaster process, which in turn sends SIGHUP to each of its children.) You can use the pg_file_settings, pg_hba_file_rules and pg_ident_file_mappings views to check the configuration files for possible errors, before reloading. They will appear in the server log based on the log configuration set (see Section 20.8 for more information), but will not be sent to the client regardless of client_min_messages.Ĭauses all processes of the PostgreSQL server to reload their configuration files. These memory contexts will be logged at LOG message level. This function can send the request to backends and auxiliary processes except logger. Requests to log the memory contexts of the backend with the specified process ID. Pg_log_backend_memory_contexts ( pid integer ) → boolean This is also allowed if the calling role is a member of the role whose backend is being canceled or the calling role has privileges of pg_signal_backend, however only superusers can cancel superuser backends. Pg_cancel_backend ( pid integer ) → booleanĬancels the current query of the session whose backend process has the specified process ID.
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