Large Tables/clustering/terrible performance of Postgresql
Hi,
Why does Postgres have such poor response times on LIKE queries.
In my database I have 1 table of 3.5 million rows. I try the follogin search
select * from table1 where name like 'SMITH, JO%';
this query takes 1:30 seconds to return the matching row.
I have physically order the table by name and added an index to name and performed a vacuum analyze to see if that helps. but still 1:30 for a result.
I have built the same setup on a MS SQL Server database and get response times of 1 to 2 seconds for the same query.
Any tips suggestions etc.. would be appreciated
Michael McAlpine
On Mon, 31 Dec 2001, Michael McAlpine wrote:
Hi,
Why does Postgres have such poor response times on LIKE queries.
In my database I have 1 table of 3.5 million rows. I try the follogin search
select * from table1 where name like 'SMITH, JO%';
this query takes 1:30 seconds to return the matching row.
I have physically order the table by name and added an index to name
and performed a vacuum analyze to see if that helps. but still 1:30
for a result.I have built the same setup on a MS SQL Server database and get
response times of 1 to 2 seconds for the same query.
What does explain say?
-jwb