Re: [PERFORM] exponential performance decrease in ISD transaction

2012-09-07 Thread John Nash
Sorry I forgot to attach the mentioned file with performance results. Please find it enclosed now. Regards 2012/9/7 John Nash : > Hi, > > We have investigated further and have observed the following: > > We have another host with postgres installed in another IP. Called host 190. > > The host we

Re: [PERFORM] exponential performance decrease in ISD transaction

2012-09-07 Thread John Nash
Hi, We have investigated further and have observed the following: We have another host with postgres installed in another IP. Called host 190. The host we have reported to have the issue is host174 We have observed that if we launch the java program from host 190 towards host 174 through the ne

Re: [PERFORM] exponential performance decrease in ISD transaction

2012-09-05 Thread Greg Smith
On 09/03/2012 01:27 PM, Jeff Janes wrote: In any case, the behavior you report is exactly would would be expected if autovacuum is not running. The config file you posted shows autovac is turned on, but I suspect that is not the config file actually being used by the running server. It's also

Re: [PERFORM] exponential performance decrease in ISD transaction

2012-09-03 Thread Jeff Janes
On Mon, Sep 3, 2012 at 4:22 AM, John Nash wrote: > Hi, > > We can try installing version 8.4.9, but when downloading the > software, we installed the binaries and files given in postgresql web > page named as version 9.1.3. This is the tar file downloaded: > > postgresql-9.1.3.tar > > Containing t

Re: [PERFORM] exponential performance decrease in ISD transaction

2012-09-03 Thread John Nash
Hi, We can try installing version 8.4.9, but when downloading the software, we installed the binaries and files given in postgresql web page named as version 9.1.3. This is the tar file downloaded: postgresql-9.1.3.tar Containing the following when un-tar-ed: [postgsql@localhost postgresql-9.1.

Re: [PERFORM] exponential performance decrease in ISD transaction

2012-08-31 Thread Jeff Janes
On Fri, Aug 31, 2012 at 5:27 AM, John Nash wrote: > -Postgresql version installed is : postgresql-9.1.3 although when > querying the database we retrieve this output. > > postgres=# select * from version(); > version > -

Re: [PERFORM] exponential performance decrease in ISD transaction

2012-08-31 Thread Heikki Linnakangas
On 31.08.2012 15:27, John Nash wrote: Program 1: dbtransfromfile: this program creates a simple table consisting of a one int column table. After the creation, the program inserts 1000 tuples in the table, which are never deleted, after that the program reads a transaction pattern from a given fi

[PERFORM] exponential performance decrease in ISD transaction

2012-08-31 Thread John Nash
Hello, We are doing some testing and have a very strange behaviour in the performance obtained with postgres while executing a Insert/select/delete transaction. Software and Hardware details: - O.S = Red hat 6.2 $ uname -a Linux localhost.localdomain 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03