On Thu, Aug 7, 2008 at 3:57 PM, Andrej Ricnik-Bay <andrej.groups@xxxxxxxxx> wrote: > 2008/8/8 Scott Marlowe <scott.marlowe@xxxxxxxxx>: >> noatime turns off the atime write behaviour. Or did you already know >> that and I missed some weird post where noatime somehow managed to >> slow down performance? > > Scott, I'm quite aware of what noatime does ... you didn't miss a post, but > if you look at Mark's graphs on > http://wiki.postgresql.org/wiki/HP_ProLiant_DL380_G5_Tuning_Guide > they pretty much all indicate that (unless I completely misinterpret the > meaning and purpose of the labels), independent of the file-system, > using noatime slows read/writes down (on average). Interesting. While a few of the benchmarks looks noticeably slower with noatime (reiserfs for instance) most seem faster in that listing. I am just now setting up our big database server for work and noticed a MUCH lower performance without noatime.
