Using RT 3.6.3
on Mysql 5.0.38
Some of our larger tickets are taking a long time to display (>10
seconds) so I thought I'd have a look to see where the time is spent.
I've added Set($StatementLog, 'crit'); to my config file to see what
queries are run and it seems like it runs a lot of queries just to
display 1 ticket and it's history.
I dumped all the queries run to display a ticket with 100 comments/
replies into a file 'just.out' and it's running approx 500 SELECT
statements:
[EMAIL PROTECTED]:~/etc$ cat just.out | grep 'SELECT' | wc -l
491
For example this query is run:
Aug 3 11:16:02 ceres RT: SQL(0.00s):
SELECT
DISTINCT main.Id AS id,
main.Filename AS filename,
main.ContentType AS contenttype,
main.Headers AS headers,
main.Subject AS subject,
main.Parent AS parent,
main.ContentEncoding AS contentencoding,
main.ContentType AS contenttype,
main.TransactionId AS transactionid,
main.Created AS created
FROM
Attachments main JOIN Transactions Transactions_1 ON
( Transactions_1.id = main.TransactionId ) JOIN Tickets Tickets_2 ON
( Tickets_2.id = Transactions_1.ObjectId )
WHERE (Tickets_2.EffectiveId = '22526') AND
(Transactions_1.ObjectType = 'RT::Ticket')
ORDER BY main.id ASC ; (/opt/rt3/share/html/autohandler:320)
Which returns 100 rows and then it runs one select for each Transaction:
Aug 3 11:16:02 ceres RT: SQL(0.00s):
SELECT * FROM Transactions WHERE id = ?; [ bound values: '197857' ]
(/opt/rt3/share/html/autohandler:320)
So you get 100 of those:
[EMAIL PROTECTED]:~/etc$ cat just.out | grep 'SELECT \* FROM Transactions' |
wc -l
100
Just wondering why it does all those 'Select *'s? Couldn't the fields
you want from Transactions be retrieved in the first query and
iterate over that in code?
Also it seems to be doing a large number of CustomField related queries.
[EMAIL PROTECTED]:~/etc$ cat just.out | grep 'CustomField' | wc -l
236
I've got 5 CustomFields at the ticket level. Why would it run 236
queries relating to CustomFields for 1 ticket?
Maybe this is all normal, with perfectly good explanation. Or maybe
my install is broken or maybe some of our customisations are causing it.
Any thoughts/opinions welcome...
Justin
------------------------------------------------------
Justin Hayes
Support Manager
[EMAIL PROTECTED]
_______________________________________________
http://lists.bestpractical.com/cgi-bin/mailman/listinfo/rt-users
Community help: http://wiki.bestpractical.com
Commercial support: [EMAIL PROTECTED]
Discover RT's hidden secrets with RT Essentials from O'Reilly Media.
Buy a copy at http://rtbook.bestpractical.com
