Greetings, Cameron!
At 06.02.2001, 14:23, you wrote:
C> whilst i know that mysql is generally faster than pgsql i just tried to
C> convert another of my mysql projects to pgsql, in mysql the list takes
C> about 1 second (SELECT * FROM email LIMIT 0,300 on 180000 records), the
C> same query in pgsql is taking around 5 seconds, i know i have tweaked
C> mysql a little and played with things to make it faster, i was wondering
C> if there are any tips to pgsql? i didnt think pgsql was that slow :(
if "SELECT * FROM email LIMIT 0,300" is your actual query, I would
strongly advise to use an ORDER BY some_indexed_field. This will make
Postgres' optimizer use an index scan. Not to mention the fact that
LIMIT without an ORDER will return you some random rows from a
table...
besides, if you are running Postgres with default options, you should
increase the amount of memory it allocates for buffers and sorting. By
default Postgres is VERY conservative about memory usage.
--
Yours, Alexey V. Borzov, Webmaster of RDW
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