Messages in this thread | | | Date | Wed, 27 Mar 2002 16:29:31 -0800 | From | Andrew Morton <> | Subject | Re: Filesystem benchmarks: ext2 vs ext3 vs jfs vs minix |
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Matthew Kirkwood wrote: > > On Wed, 27 Mar 2002, Andrew Morton wrote: > > > > Yeah, I thought it was a little odd. Postgres does so much > > > fsync()ing that I thought it may just have been that the lower > > > overhead won out over ext2's cleverer layout. All the I/O was > > > basically fsync-driven, so this test was only about write > > > performance. > > > > For fsync-intensive loads ext3's best mode is generally > > data=journal. That way, an fsync is satisfied by a nice > > single linear write to the journal. > > Here we are. This is with just a 200Mb journal (the partition > is only a little over 1Gb, and the datafiles grow fairly big, > so I didn't brave making it any bigger). > > tuning? single ir mx-ir oltp mixed-oltp > (sec) (tps) (sec) (tps) (sec) > ext3 bn 1285.32 65.98 1996.41 90.05 307.79 > ext3-wb bn 1287.31 98.42 2149.38 125.13 236.02 > ext3-jd bn 1306.90 72.07 1813.54 125.15 305.27
Oh well.
It sounds like a useful and valid workload to optimise for. So I'll take you up on the offer of those scripts, please.
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