Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-04-16 Thread Franck Routier
Le 29/03/2013 15:20, Franck Routier a écrit : Hi, I have a postgresql database (8.4) running in production whose performance is degrading. There is no single query that underperforms, all queries do. Another interesting point is that a generic performance test (https://launchpad.net/tpc-b) gi

Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-03-30 Thread Jeff Janes
On Fri, Mar 29, 2013 at 8:31 AM, Franck Routier wrote: > Hi, > > I don't know that tcp-b does >> > tpcb.jar is a java implementation of the http://www.tpc.org/tpcb/benchmark. > It is not particularly representative of my workload, but gives > a synthetic, db-agnostic, view of the system performa

Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-03-30 Thread Cédric Villemain
> > I don't know that tcp-b does > > tpcb.jar is a java implementation of the http://www.tpc.org/tpcb/ > benchmark. It is not particularly representative of my workload, but > gives a synthetic, db-agnostic, view of the system performance. > We use it to have quick view to compare differents serve

Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-03-29 Thread Guillaume Cottenceau
Franck Routier writes: >> http://wiki.postgresql.org/wiki/Show_database_bloat > How do I interpret the output of this query ? Is 1.1 bloat level on a > table alarming, or quite ok ? I am not very used to this, but I'd start by comparing the top result in your established DB against the top resul

Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-03-29 Thread Jeff Janes
On Fri, Mar 29, 2013 at 7:20 AM, Franck Routier wrote: > Hi, > > I have a postgresql database (8.4) running in production whose performance > is degrading. > There have been substantial improvements in performance monitoring in newer versions, so using 8.4 limits your options. > There is no si

Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-03-29 Thread Franck Routier
Hi, I don't know that tcp-b does tpcb.jar is a java implementation of the http://www.tpc.org/tpcb/ benchmark. It is not particularly representative of my workload, but gives a synthetic, db-agnostic, view of the system performance. We use it to have quick view to compare differents servers (dif

Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-03-29 Thread Guillaume Cottenceau
Franck Routier writes: > Hi, > > I have a postgresql database (8.4) running in production whose > performance is degrading. > There is no single query that underperforms, all queries do. > Another interesting point is that a generic performance test > (https://launchpad.net/tpc-b) gives mediocre

Re: [PERFORM] Postgresql performance degrading... how to diagnose the root cause

2013-03-29 Thread Julien Cigar
On 03/29/2013 15:20, Franck Routier wrote: Hi, Hello, I have a postgresql database (8.4) running in production whose performance is degrading. There is no single query that underperforms, all queries do. Another interesting point is that a generic performance test (https://launchpad.net/tp