On Wednesday, January 09, 2013 4:57 PM Simon Riggs wrote: > On 9 January 2013 08:05, Amit kapila <amit.kap...@huawei.com> wrote: > > > Update patch contains handling of below Comments > > Thanks > > > > Test results with modified pgbench (1800 record size) on the latest > patch: > > > > -Patch- -tps@-c1- -WAL@-c1- -tps@-c2- - > WAL@-c2- > > Head 831 4.17 GB 1416 7.13 > GB > > WAL modification 846 2.36 GB 1712 3.31 > GB > > > > -Patch- -tps@-c4- -WAL@-c4- -tps@-c8- - > WAL@-c8- > > Head 2196 11.01 GB 2758 13.88 > GB > > WAL modification 3295 5.87 GB 5472 9.02 > GB > > And test results on normal pgbench?
configuration: shared_buffers = 4GB wal_buffers = 16MB checkpoint_segments = 256 checkpoint_interval = 15min autovacuum = off server_encoding = SQL_ASCII client_encoding = UTF8 lc_collate = C lc_ctype = C init: pgbench -s 75 -i -F 80 run: pgbench -T 600 Test results with original pgbench (synccommit off) on the latest patch: -Patch- -tps@-c1- -WAL@-c1- -tps@-c2- -WAL@-c2- Head 1459 1.40 GB 2491 1.70 GB WAL modification 1558 1.38 GB 2441 1.59 GB -Patch- -tps@-c4- -WAL@-c4- -tps@-c8- -WAL@-c8- Head 5139 2.49 GB 10651 4.72 GB WAL modification 5224 2.28 GB 11329 3.96 GB Test results with original pgbench (synccommit on) on the latest patch: -Patch- -tps@-c1- -WAL@-c1- -tps@-c2- -WAL@-c2- Head 146 0.45 GB 167 0.49 GB WAL modification 144 0.44 GB 166 0.49 GB -Patch- -tps@-c4- -WAL@-c4- -tps@-c8- -WAL@-c8- Head 325 0.77 GB 603 1.03 GB WAL modification 321 0.76 GB 604 1.01 GB The results are similar as noted by Kyotaro-San. The WAL size is reduced even for original pgbench. There is slight performance dip in some of the cases for original pgbench. With Regards, Amit Kapila. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
