-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/14/2014 04:17 PM, Tom Lane wrote: > Andres Freund <and...@2ndquadrant.com> writes: >> On 2014-04-14 14:33:03 -0700, Joe Conway wrote: >>> checkpoint_segments = 96 checkpoint_timeout = 10min > >> I bet you'll see noticeably - while still not great - better >> performance by setting checkpoint_timeout to an hour (with a >> corresponding increase in checkpoint_segments). Have you checked >> how often checkpoints are actually created? I'd bet it's far more >> frequent than every 10min with that _segments setting and such a >> load. > > My thoughts exactly. It's not hard to blow through WAL at > multiple megabytes per second with modern machines. I'd turn on > checkpoint logging and then do whatever you need to do to get the > actual intercheckpoint time up to 10-15 minutes at least.
That'll help performance, but lets say I generally keep WAL files for PITR and don't turn that off before starting -- shouldn't I be very surprised to need over 3TB of archive storage when loading a 50GB table with a couple of indexes? Joe - -- Joe Conway credativ LLC: http://www.credativ.us Linux, PostgreSQL, and general Open Source Training, Service, Consulting, & 24x7 Support -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJTTG3IAAoJEDfy90M199hluaIP/00NYTg+AiRNTaMkhZAqFxxl 8Fysfbe9UXedGU/3hzcq0rCNuQEuG4qiNjGEBCgsQuW9smxvzIzuT5EAAmdOP6jR lWGW1574g9qaRT2GNTnlt5hKArVJtE+wlmzspAK12aiLlhSax4o0dAIibRliZ+nZ a7Ay8ZcrwcNCyZKg0UjXhZ75SXQyxdYxygIhMzmYgB9UyfTxh0Dbujd692QvpzyG gnBl6iqZH/EJFkU821QILf7UNzGALdZ3aSpfijwtkAnIyMt5ZB5JzuEFCd/+Xpe7 GZnl4hKpyD9chqQ+vv4YRJrdAxH3pfsYPo/ksyMZrRnBl5ezDLehdopLXEsh4hZI XDVqQPgC1tPR6DNAYAWT2bR2iO11GZLyhmZ8aU7eDVbBlUe7bE37L3f4yr3shzsm A98J1GbDq4NYWJPeta8x0o8xg3A+HR/Q/+qYqH4hgRU+RhuV4kQ5Vl1xIP9a0gqV +95y6sznGM0mtDfZMvqf3uNotKpIKeBCsHyshMXXYiPr4JxkymIAuh1zYLzQMBN5 wrJ2hUG2wIH2hra3sihokyZeqK9CeO7jEtVEtaGz8CEL2ihHnAMkO6uRWzpsOgW4 Xk8+iWt+RO7dfPBNa1N0urCCgr3KYOE0M5TaxtrGnfT7/bGlcNKpVIC9a48SqK+U acttmBm6Ev8XVyEqpUit =GT5+ -----END PGP SIGNATURE----- -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
