table of contents
PG_TEST_FSYNC(1) | PostgreSQL 12.20 Documentation | PG_TEST_FSYNC(1) |
NAME¶
pg_test_fsync - determine fastest wal_sync_method for PostgreSQL
SYNOPSIS¶
pg_test_fsync [option...]
DESCRIPTION¶
pg_test_fsync is intended to give you a reasonable idea of what the fastest wal_sync_method is on your specific system, as well as supplying diagnostic information in the event of an identified I/O problem. However, differences shown by pg_test_fsync might not make any significant difference in real database throughput, especially since many database servers are not speed-limited by their write-ahead logs. pg_test_fsync reports average file sync operation time in microseconds for each wal_sync_method, which can also be used to inform efforts to optimize the value of commit_delay.
OPTIONS¶
pg_test_fsync accepts the following command-line options:
-f
--filename
-s
--secs-per-test
-V
--version
-?
--help
ENVIRONMENT¶
The environment variable PG_COLOR specifies whether to use color in diagnostic messages. Possible values are always, auto and never.
SEE ALSO¶
2024 | PostgreSQL 12.20 |