Roye Cohen wrote: > > The following bug has been logged online: > > Bug reference: 6311 > Logged by: Roye Cohen > Email address: roye.co...@sap.com > PostgreSQL version: 9.1.1 > Operating system: Linux Redhat > Description: Performance degradation after upgrade > Details: > > Hi, > > I am a performance engineer. I was conducting a comparison from postgres 9.0 > to 9.1.1 in order to upgrade to the newest version. > I found a degradation in physical memory used on DB server (~200% > degradation) and a small degradation in response times on every transaction > monitored in comparison to 9.0.
I am confused by the word "degradation". You mean that Postgres 9.1 used 3x more memory than PG 9.0? How much slower was it? > The test was done on HP LoadRunner with 300 concurrent users executing a > flow of events. > > The exact sequence of steps is hard to describe but it is important to > state that the executions were exactly the same. Default postgres settings > were used (settings were not changed after installing postgres). > > > OS Version: Linux 2.6.18-164.el5 x86_64 > > I am at your service if you have any further inqueries. We have certainly never heard of a report like this between PG 9.0 and 9.1, so I am confused. Was their any change in the client interface software between the two tests? -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs
