Re: Windows XP selects are very slow
От | Usama Munir Dar |
---|---|
Тема | Re: Windows XP selects are very slow |
Дата | |
Msg-id | 474D940D.2060005@enterprisedb.com обсуждение исходный текст |
Ответ на | Windows XP selects are very slow ("Shadkam Islam" <shadkam@ba-sys.com>) |
Список | pgsql-performance |
PG generally comes with very basic default settings, one *start* maybe this page for you http://www.webservices.uiuc.edu/postgresql/ Then obviously you will need to work though your query plans and iterate. Shadkam Islam wrote: > Hi All, > > We are having a table whose data we need to bucketize and show. This is > a continuously growing table (archival is a way to trim it to size). > We are facing 2 issues here: > > 1. When the records in the table are in the range of 10K, it works fine > for some time after starting postgres server. But as time passes, the > entire machine becomes slower and slower - to the extent that we need to > go for a restart. Though taskmgr does not show any process consuming > extra-ordinary amount of CPU / Memory. After a restart of postgres > server, things come back to normal. What may be going wrong here? > > 2. When the records cross 200K, the queries (even "select count(*) from > _TABLE_") start taking minutes, and sometimes does not return back at > all. We were previously using MySql and at least this query used to work > OK there. [Our queries are of the form "select sum(col1), sum(col2), > count(col3) ... where .... group by ... " ]. Any suggestions ... > > Below is the tuning parameter changes thet we did with the help from > internet: > > We are starting postgres with the options [-o "-B 4096"], later we added > > a "-S 1024" as well - without any visible improvement. > Machine has 1GB RAM. > > shadkam > > ---------------------------(end of broadcast)--------------------------- > TIP 5: don't forget to increase your free space map settings >
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