CentOS 7.0 - man page for pg_test_fsync (centos section 1)

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PG_TEST_FSYNC(1)		  PostgreSQL 9.2.7 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 difference in real database throughput, especially since many database
       servers are not speed-limited by their transaction logs.

OPTIONS
       pg_test_fsync accepts the following command-line options:

       -f, --filename
	   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.

       -s, --secs-per-test
	   Specifies the number of seconds for each test. The more time per test, the greater the
	   test's accuracy, but the longer it takes to run. The default is 2 seconds, which
	   allows the program to complete in about 30 seconds.

       -V, --version
	   Print the pg_test_fsync version and exit.

       -?, --help
	   Show help about pg_test_fsync command line arguments, and exit.

AUTHOR
       Bruce Momjian <bruce@momjian.us>

SEE ALSO
       postgres(1)

PostgreSQL 9.2.7			    2014-02-17				 PG_TEST_FSYNC(1)
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