> We have a GUI that let user browser through the record page by page at > about 25 records a time. (Don't ask me why but we have to have this > GUI). This translates to something like > > select count(*) from table <-- to give feedback about the DB size
Do you have a integer field that is an ID that increments? E.g; serial? > select * from table order by date limit 25 offset 0 You could use a cursor. Sincerely, Joshua D. Drake > > Tables seems properly indexed, with vacuum and analyze ran regularly. > Still this very basic SQLs takes up to a minute run. > > I read some recent messages that select count(*) would need a table > scan for Postgre. That's disappointing. But I can accept an > approximation if there are some way to do so. But how can I optimize > select * from table order by date limit x offset y? One minute > response time is not acceptable. > > Any help would be appriciated. > > Wy > > -- The PostgreSQL Company - Command Prompt, Inc. 1.503.667.4564 PostgreSQL Replication, Consulting, Custom Development, 24x7 support Managed Services, Shared and Dedicated Hosting Co-Authors: plPHP, plPerlNG - http://www.commandprompt.com/ ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
