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Hello Suhas,
You need to supply good information for an accurate answer. Please have a look at this link: http://wiki.postgresql.org/wiki/Slow_Query_Questions Kind regards, Willem
> Date: Wed, 5 Dec 2012 00:10:10 -0800 > From: suhas.b@xxxxxxxx > To: pgsql-performance@xxxxxxxxxxxxxx > Subject: CREATING INDEX on column having null values > > Hi, > > > I have a partitioned table(partitioned on date) .There are about 1 million > insertions per day. There is a column called mess_id. This column is updated > .But update query is taking huge time.When i checked , this column is not > unique, and most of the time its having null . Say everyday out of 1 > million only 20K rows are not null for this column ;.Insertions are > happening very fast , but update is very slow. > > How to optimize my update query? Is it good to create index on that > column .. i m worried about my insertions getting slow > > Rgrds > Suhas > > > > -- > View this message in context: http://postgresql.1045698.n5.nabble.com/CREATING-INDEX-on-column-having-null-values-tp5735127.html > Sent from the PostgreSQL - performance mailing list archive at Nabble.com. > > > -- > Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-performance |
