I have modified src/tools/test_fsync so its output is operations per
second, instead of total seconds, e.g.:
Loops = 10000Simple write: 8k write 52549.436/secondCompare file sync methods using one
write: (open_datasync unavailable) open_sync 8k write 575.599/second (fdatasync
unavailable) 8k write, fsync 349.669/secondCompare file sync methods using two writes:
(open_datasyncunavailable) 2 open_sync 8k writes 215.472/second (fdatasync unavailable)
8kwrite, 8k write, fsync 566.493/secondCompare open_sync with different sizes: open_sync 16k write
247.207/second 2 open_sync 8k writes 219.824/secondTest if fsync on non-write file descriptor is
honored:(Ifthe times are similar, fsync() can sync data writtenon a different descriptor.) 8k write, fsync,
close 719.469/second 8k write, close, fsync 1457.288/second
This should make the values more useful.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ None of us is going to be here forever. +
