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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks for the response Torsten.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I gave that a try, but unfortunately it didn’t speed it up
any. We luckily had only merged a couple of times so once we get
them closed hopefully we won’t touch them again for a while.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks again,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Kenny <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Torsten Brumm
[mailto:torsten.brumm@googlemail.com] <br>
<b>Sent:</b> Tuesday, November 11, 2008 10:11 AM<br>
<b>To:</b> Kenny Seever<br>
<b>Cc:</b> rt-users@lists.bestpractical.com<br>
<b>Subject:</b> Re: [rt-users] Slow GET_LOCK queries on merged tickets<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Hi Kenny,<br>
we had exactly the same problem. i'm not sure if our solution is the best, but
it helped us to get rid of this.<br>
<br>
We changed the following: (and again, i'm not sure if it is a good idea, but it
fixes the problem)<br>
<br>
grab up from /usr/lib/perl5/site_perl/5.8.xxx/Apache/Session/Lock the file
MySQL.pm and find the line with my GET_LOCK, its around line 53. It uses
default 3600 sec for lock timeout. we changed this to 1sec.<br>
<br>
50 #MySQL requires a timeout
on the lock operation. There is no option<br>
51 #to simply wait
forever. So we'll wait for a hour.<br>
52<br>
53 my $sth = $self->{dbh}->prepare_cached(q{SELECT
GET_LOCK(?, 1)}, {}, 1);<br>
<br>
And again, and hopefully some of the DB/PERL Gurus have a better idea, this
fixed our problem (for over one year) but i'm not sure which site effects it
has (we discovered nothing so far....)<br>
<br>
Torsten<o:p></o:p></p>
<div>
<p class=MsoNormal>2008/11/7 Kenny Seever <<a
href="mailto:kseever@innonetkc.com">kseever@innonetkc.com</a>><o:p></o:p></p>
<div>
<div>
<p>Hello everyone. I was looking through the archives and came
across the following. It looks like we are having the same problem and I
was wondering if a solution was ever found.<o:p></o:p></p>
<p> <o:p></o:p></p>
<p>Thanks in advance,<o:p></o:p></p>
<p> <o:p></o:p></p>
<p>Kenny Seever<o:p></o:p></p>
<p>Innovative Networks, Inc.<o:p></o:p></p>
<p> <o:p></o:p></p>
<p> <o:p></o:p></p>
<p> <o:p></o:p></p>
<p>Original Message…:<o:p></o:p></p>
<p> <o:p></o:p></p>
<p><span style='font-size:10.0pt;color:black'>Hi all, <br>
<br>
<br>
<br>
I managed to track down a problem with merged tickets being <b><span
style='background:#FFAAAA'>slow</span></b> to <br>
display. I have enabled the <b><span style='background:#FFAAAA'>slow</span></b>
queries log on Mysql (5.0.51a) and get <br>
the following in the log files. I searched over the RT list archives and <br>
I found note of setting low_priority_updates to <b><span style='background:
#AAFFAA'>1</span></b> on mysql for this. <br>
This however makes no difference. Does someone perhaps have an answer <br>
for this problem? <br>
<br>
<br>
<br>
The server is a test setup I made to test the migration of <b><span
style='background:#FFFF80'>3</span></b>.6.6 RT <br>
installation to <b><span style='background:#FFFF80'>3</span></b>.<b><span
style='background:#AAAAFF'>8</span></b>.<b><span style='background:#AAFFAA'>1</span></b>.
The problem was there in <b><span style='background:#FFFF80'>3</span></b>.6.6
when I imported <br>
the production database from a mysql dump the production server also <br>
running rt <b><span style='background:#FFFF80'>3</span></b>.6.6 is fine (not <b><span
style='background:#FFAAAA'>slow</span></b> on merged tickets). The difference <br>
between the systems is that the production server is a Redhat Enterprise <br>
4 server (MySQL-server-community-5.0.51a-0.rhel4) and the test system is <br>
a newer Fedora 9 (mysql-server-5.0.51a-<b><span style='background:#AAFFAA'>1</span></b>.fc9).
The fedora 9 installation <br>
installed all required modules from CPAN during installation. After <br>
migrating it to <b><span style='background:#FFFF80'>3</span></b>.<b><span
style='background:#AAAAFF'>8</span></b>.<b><span style='background:#AAFFAA'>1</span></b>
the problem remains. It looks like it slightly <br>
faster but not much. Database has been updated from mysql 4.0 to 4.<b><span
style='background:#AAFFAA'>1</span></b> <br>
followed by the database update script. All is working fine accept for <br>
the <b><span style='background:#FFAAAA'>slow</span></b> queries on merged
tickets and the GET_LOCK reports in the <b><span style='background:#FFAAAA'>slow</span></b>
<br>
query log. <br>
<br>
<br>
<br>
I've cleared the session table. This currently makes no difference. It <br>
had about 1100 records in it before I cleared it. <br>
<br>
<br>
<br>
Regards, <br>
<br>
<br>
<br>
Ton Hoogstraten <br>
<br>
<br>
<br>
SELECT GET_LOCK('Apache-Session-7dee36ca13e864c568b1659d2fa18751', <br>
3600); <br>
<br>
</span><span style='font-size:10.0pt;color:#660066'># Time: 080822 14:36:01 <br>
</span><span style='font-size:10.0pt;color:black'><br>
</span><span style='font-size:10.0pt;color:#660066'># User[at]Host: rt[rt] @
localhost [] <br>
</span><span style='font-size:10.0pt;color:black'><br>
</span><span style='font-size:10.0pt;color:#660066'># Query_time: 110
Lock_time: 0 Rows_sent: </span><b><span style='font-size:10.0pt;color:black;
background:#AAFFAA'>1</span></b><span style='font-size:10.0pt;color:#660066'>
Rows_examined: 0 <br>
</span><span style='font-size:10.0pt;color:black'><br>
SELECT GET_LOCK('Apache-Session-a196db0f41ab721840dba0b78f2dd36e', <br>
3600); <br>
<br>
</span><span style='font-size:10.0pt;color:#660066'># User[at]Host: rt[rt] @
localhost [] <br>
</span><span style='font-size:10.0pt;color:black'><br>
</span><span style='font-size:10.0pt;color:#660066'># Query_time: 80 Lock_time:
0 Rows_sent: </span><b><span style='font-size:10.0pt;color:black;background:
#AAFFAA'>1</span></b><span style='font-size:10.0pt;color:#660066'>
Rows_examined: 0 <br>
</span><span style='font-size:10.0pt;color:black'><br>
SELECT GET_LOCK('Apache-Session-a196db0f41ab721840dba0b78f2dd36e', <br>
3600);</span><o:p></o:p></p>
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<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
MFG<br>
<br>
Torsten Brumm<br>
<br>
<a href="http://www.torsten-brumm.de">http://www.torsten-brumm.de</a><o:p></o:p></p>
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