Hi Ken, I was just thinking the same about the counts - it has to do that for pagination. Though I guess it could have been written to run 1 query for all the data, and just display the first 50 etc.
Which DB backend would work faster? Thanks, Justin ------------------------------------------------- Justin Hayes OpenBet Support Manager [email protected] On 7 Dec 2010, at 17:40, Kenneth Marshall wrote: > You need to use a DB backend that supports fulltext indexing for > content searchs to be fast. The actual query that you stated runs > quickly, is only for the first 50 tickets. I do agree that running > the same count() query twice for the same search is sub-optimal. I > do not see how you could avoid the count query totally if you are > paginating the results. > > Cheers, > Ken > > On Tue, Dec 07, 2010 at 05:31:17PM +0000, Justin Hayes wrote: >> Guys, >> >> Searching for ticket content takes forever. I've done a bit of digging and >> for a single search in one of my queues over the last year, RT spawned 3 >> separate queries. >> >> 2 are counts (which appear to be identical), and 1 gets the actual content. >> >> Is there anyway round this? Losing loads of time just to get counts seems >> rather counter-productive? The final select was actually pretty quick. >> >> I've added the queries below. >> >> Many thanks, >> >> Justin >> >> # Time: 101207 17:24:09 >> # u...@host: rt_support[rt_support] @ localhost [] >> # Query_time: 57.722237 Lock_time: 0.000183 Rows_sent: 1 Rows_examined: >> 122794 >> SET timestamp=1291742649; >> SELECT COUNT(DISTINCT main.id) FROM Tickets main JOIN Transactions >> Transactions_1 ON ( Transactions_1.ObjectId = main.id ) JOIN Attachments >> Attachments_2 ON ( Attachments_2.TransactionId = Transactions_1.id ) WHERE >> (Transactions_1.ObjectType = 'RT::Ticket') AND (main.Status != 'deleted') >> AND (main.Created > '2010-01-01 00:00:00' AND main.Queue = '4' AND >> Attachments_2.Content LIKE '%testing%') AND (main.Type = 'ticket') AND >> (main.EffectiveId = main.id); >> >> # Time: 101207 17:24:38 >> # u...@host: rt_support[rt_support] @ localhost [] >> # Query_time: 28.780620 Lock_time: 0.000510 Rows_sent: 1 Rows_examined: >> 122794 >> SET timestamp=1291742678; >> SELECT COUNT(DISTINCT main.id) FROM Tickets main JOIN Transactions >> Transactions_1 ON ( Transactions_1.ObjectId = main.id ) JOIN Attachments >> Attachments_2 ON ( Attachments_2.TransactionId = Transactions_1.id ) WHERE >> (Transactions_1.ObjectType = 'RT::Ticket') AND (main.Status != 'deleted') >> AND (main.Created > '2010-01-01 00:00:00' AND main.Queue = '4' AND >> Attachments_2.Content LIKE '%testing%') AND (main.Type = 'ticket') AND >> (main.EffectiveId = main.id); >> >> # Time: 101207 17:24:42 >> # u...@host: rt_support[rt_support] @ localhost [] >> # Query_time: 4.492875 Lock_time: 0.000175 Rows_sent: 50 Rows_examined: >> 100799 >> SET timestamp=1291742682; >> SELECT DISTINCT main.* FROM Tickets main JOIN Transactions Transactions_1 >> ON ( Transactions_1.ObjectId = main.id ) JOIN Attachments Attachments_2 ON >> ( Attachments_2.TransactionId = Transactions_1.id ) WHERE >> (Transactions_1.ObjectType = 'RT::Ticket') AND (main.Status != 'deleted') >> AND (main.Created > '2010-01-01 00:00:00' AND main.Queue = '4' AND >> Attachments_2.Content LIKE '%testing%') AND (main.Type = 'ticket') AND >> (main.EffectiveId = main.id) ORDER BY main.id ASC LIMIT 50; >> >> ------------------------------------------------- >> Justin Hayes >> OpenBet Support Manager >> [email protected] >> >>
