Re: [PERFORM] performance regression with Linux 2.6.33 and glibc 2.12

2010-06-04 Thread Marc Cousin
The Friday 04 June 2010 15:59:05, Tom Lane wrote : > Marc Cousin writes: > > I hope I'm not going to expose an already known problem, but I couldn't > > find it mailing list archives (I only found > > http://archives.postgresql.org/pgsql- hackers/2009-12/msg01543.php). > > You sure this isn't the

Re: [PERFORM] performance regression with Linux 2.6.33 and glibc 2.12

2010-06-04 Thread Andres Freund
On Friday 04 June 2010 15:59:05 Tom Lane wrote: > Marc Cousin writes: > > I hope I'm not going to expose an already known problem, but I couldn't > > find it mailing list archives (I only found > > http://archives.postgresql.org/pgsql- hackers/2009-12/msg01543.php). > > You sure this isn't the we

Re: [PERFORM] performance regression with Linux 2.6.33 and glibc 2.12

2010-06-04 Thread Tom Lane
Marc Cousin writes: > I hope I'm not going to expose an already known problem, but I couldn't find > it mailing list archives (I only found http://archives.postgresql.org/pgsql- > hackers/2009-12/msg01543.php). You sure this isn't the well-known "ext4 actually implements fsync where ext3 didn't"

[PERFORM] performance regression with Linux 2.6.33 and glibc 2.12

2010-06-04 Thread Marc Cousin
Hi. I hope I'm not going to expose an already known problem, but I couldn't find it mailing list archives (I only found http://archives.postgresql.org/pgsql- hackers/2009-12/msg01543.php). On one of my (non production) machines, I've just seen a very big performance regression (I was doing a ve