[PERFORM] template1 vacuuming consuming much time compared to another production DBs
Hi, I am using postgresql 8.1 DB. I have a large DB and i run the vacuum every hour with vocuumdb --analyze -a option. Some times template1 consumes much time in comparison to my own DB.I think at these times the load on OS is higher. But from iostat logs i can see that the load on the partition where DB resides is not too much. I would like to know why such thing happens? What are the processing that is carried out with the template1 vacuuming. When the entries in template1 is updated and inserted? What should be the frequency of template1 vacuuming? Is template1 is updated as frequent as my own DB is updated? Thanks, Pradeep -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
Re: [PERFORM] template1 vacuuming consuming much time compared to another production DBs
On 04/22/2013 07:31 AM, pradeep singh wrote: Hi, I am using postgresql 8.1 DB. Why are you using a release of Postgres that is way out of date and unsupported? cheers andrew -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
Re: [PERFORM] template1 vacuuming consuming much time compared to another production DBs
I am using this DB since last 3 or 4 years. And suddenly we can't update it. We are planning it at the end of year. Recently we faced the template1 wraparound issue. So we added template1 also for vacuuming. We are vacuuming the DB each hour with 'vacuumdb --analyze -a' options. Now the vacuuming of template1 consumes time. And the queries become slow. From the logs i find that during this we period there are lot of backend processes in startup state. so i think connection open is slow. They are waiting on WCHAN log_wait_. So could you please recommend what may be the problem. FYI there is much load on OS this time. And why vacuuming of template1 only consumes time not other DBs? On Mon, Apr 22, 2013 at 9:08 PM, Andrew Dunstan and...@dunslane.net wrote: On 04/22/2013 07:31 AM, pradeep singh wrote: Hi, I am using postgresql 8.1 DB. Why are you using a release of Postgres that is way out of date and unsupported? cheers andrew -- pradeep singh biet jhansi
