pg_test_fsyncpg_test_fsyncpg_test_fsync> is intended to give you a reasonable
idea of what the fastest 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 difference in real database throughput, especially
since many database servers are not speed-limited by their transaction
logs.
Usage
pg_test_fsync [options]
pg_test_fsync accepts the following
command-line options:
Specifies the file name to write test data in.
This file should be in the same file system that the
pg_xlog> directory is or will be placed in.
(pg_xlog> contains the WAL> files.)
The default is pg_test_fsync.out> in the current
directory.
Specifies the number of operations per test. The more operations
per test, the greater the test's accuracy, but the longer it takes
to run. The default is 2000.
Author
Bruce Momjian bruce@momjian.us