On 08 October 2013 15:22 KONDO Mitsumasa wrote: > (2013/10/08 17:33), Haribabu kommi wrote: >> The checkpoint_timeout and checkpoint_segments are increased to make sure no >> checkpoint happens during the test run.
>Your setting is easy occurred checkpoint in checkpoint_segments = 256. I don't >know number of disks in your test server, in my test server which has 4 >magnetic disk(1.5k rpm), postgres generates 50 - 100 WALs per minutes. A manual checkpoint is executed before starting of the test and verified as no checkpoint happened during the run by increasing the "checkpoint_warning". >And I cannot understand your setting which is sync_commit = off. This setting >tend to cause cpu bottle-neck and data-loss. It is not general in database >usage. Therefore, your test is not fair comparison for Fujii's patch. I chosen the sync_commit=off mode because it generates more tps, thus it increases the volume of WAL. I will test with sync_commit=on mode and provide the test results. Regards, Hari babu. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
