Comments on: A comment on very large shared_buffers benchmarks http://www.xaprb.com/blog/2008/12/16/a-comment-on-very-large-shared_buffers-benchmarks/ Stay curious! Fri, 10 May 2013 18:25:19 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Selena Deckelmann http://www.xaprb.com/blog/2008/12/16/a-comment-on-very-large-shared_buffers-benchmarks/#comment-15626 Selena Deckelmann Wed, 07 Jan 2009 00:19:10 +0000 http://www.xaprb.com/blog/?p=734#comment-15626 Hi Kenny,

No plans to test VxFS — we’re sticking to open source and non-restrictive EULAs for now :)

And re: Direct I/O — I’m assuming you mean enabling that in the filesystems. But I’m not sure how that would help Postgres performance at this time, as it wouldn’t take advantage of the cache being disabled.

-selena

]]> By: Kenny Gorman http://www.xaprb.com/blog/2008/12/16/a-comment-on-very-large-shared_buffers-benchmarks/#comment-15625 Kenny Gorman Tue, 06 Jan 2009 23:46:24 +0000 http://www.xaprb.com/blog/?p=734#comment-15625 Selena,

Interesting stuff. Are you planning to test VxFS and/or any combination of Direct I/O?

]]> By: Selena Deckelmann http://www.xaprb.com/blog/2008/12/16/a-comment-on-very-large-shared_buffers-benchmarks/#comment-15569 Selena Deckelmann Wed, 17 Dec 2008 16:36:25 +0000 http://www.xaprb.com/blog/?p=734#comment-15569 I can’t speak for Kenny, but a few of us in Portland are running some shared_buffers tests with a system donated to us by HP. The tests are not available yet – lots of data, and lots of graphs to make :)

Our notes from IO testing and initial Postgres testing are at: http://wiki.postgresql.org/wiki/HP_ProLiant_DL380_G5_Tuning_Guide

I’ll be presenting results from our Postgres testing at FOSDEM! These tests are with 8.3 so far. They take a long time, so we’re not sure we’ll get to 8.4 by then.

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