test_fsync open_sync test - Mailing list pgsql-hackers

From Bruce Momjian
Subject test_fsync open_sync test
Date
Msg-id 201101171602.p0HG2L000121@momjian.us
Whole thread Raw
Responses Re: test_fsync open_sync test  (Greg Smith <greg@2ndquadrant.com>)
List pgsql-hackers
Is there a value to this test_fsync test?
Compare open_sync with different sizes:(This is designed to compare the cost of one largesync'ed write and two smaller
sync'edwrites.)        open_sync 16k write               242.563 ops/sec        2 open_sync 8k writes
752.752ops/sec
 

It compares the cost of doing larger vs. two smaller open_sync writes.

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
 + It's impossible for everything to be true. +


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