Exit status Post: 302233798

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pg_test_fsync

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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