lkml.org 
[lkml]   [2008]   [May]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: PostgreSQL pgbench performance regression in 2.6.23+
    From
    Date

    On Wed, 2008-05-21 at 13:34 -0400, Greg Smith wrote:
    > PostgreSQL ships with a simple database benchmarking tool named pgbench,
    > in what's labeled the contrib section (in many distributions it's a
    > separate package from the main server/client ones). I see there's been
    > some work done already improving how the PostgreSQL server works under the
    > new scheduler (the "Poor PostgreSQL scaling on Linux 2.6.25-rc5" thread).
    > I wanted to provide you a different test case using pgbench that has taken
    > a sharp dive starting with 2.6.23, and the server improvement changes in
    > 2.6.25 actually made this problem worse.
    >
    > I think it will be easy for someone else to replicate my results and I'll
    > go over the exact procedure below.

    Yup, I can reproduce. Running the test with 2.6.25.4, everything is
    waking/running on one CPU, leaving my box 75% idle. Not good.

    -Mike



    \
     
     \ /
      Last update: 2008-05-22 09:13    [W:0.020 / U:29.360 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site