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<p class=MsoNormal><span style='color:#1F497D'>Hello all ,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks for your answers .<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I have updated our rt3
into RT 3.8.2 and updated again mysql to 5.0.45 .We have the same
problem, this did not resolved our issue .That query is running for a long
time, causing the table to lock, web interface of the user who is using the
Search/Build.html page to timeout, and giving other users delays in
accessing the tickets .<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I have also installed
mysqltuner.pl , there are no issues reported , everything is green .I
have also used mysqlreport to check running parameters , and there
was nothing that could cause an mysql server performance issue .<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Any other ideas ?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>PS : Liviu (the
person who reported first this issue) and I ,we are colleagues working on this
case .<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Greetings,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Adrian Alexandrescu.<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<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"'>
rt-users-bounces@lists.bestpractical.com
[mailto:rt-users-bounces@lists.bestpractical.com] <b>On Behalf Of </b>Liviu
Costea<br>
<b>Sent:</b> Friday, April 24, 2009 5:13 PM<br>
<b>To:</b> 'rt-users@lists.bestpractical.com'<br>
<b>Subject:</b> [rt-users] Query Builder very slow after system update<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Hello,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>We
recently updated our RT3 server ( RT 3.8.1 , around 200000 tickets) from Red
Hat Enterprise Linux 5.1 to 5.3 (yum update). The new MySQL installed version
is 5.0.45.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Since
the upgrade RT3 is working normally except Query Builder</span> ( <span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a
href="http://%3crt3_url%3e/rt3/Search/Build.html">http://<rt3_url>/rt3/Search/Build.html</a>
) which is very slow. I identified the query that’s taking too long:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>mysql>
SELECT DISTINCT main.* FROM Users main CROSS JOIN ACL ACL_4 JOIN Principals
Principals_1 ON ( Principals_1.id = main.id ) JOIN
CachedGroupMembers CachedGroupMembers_2 ON (
CachedGroupMembers_2.MemberId = Principals_1.id ) JOIN Groups Groups_3
ON ( Groups_3.id = CachedGroupMembers_2.GroupId ) WHERE
(Principals_1.Disabled = '0') AND (ACL_4.PrincipalType = Groups_3.Type)
AND (Principals_1.id != '1') AND (Principals_1.PrincipalType =
'User') AND (ACL_4.RightName = 'OwnTicket') AND (Groups_3.Domain
= 'RT::Queue-Role') AND ((ACL_4.ObjectType = 'RT::Queue')
OR (ACL_4.ObjectType = 'RT::System')) ORDER BY main.Name ASC;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Empty
set (2 min 57.79 sec)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Additional
info:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>mysql>
EXPLAIN SELECT DISTINCT main.* FROM Users main CROSS JOIN ACL ACL_4 JOIN Principals
Principals_1 ON ( Principals_1.id = main.id ) JOIN
CachedGroupMembers CachedGroupMembers_2 ON (
CachedGroupMembers_2.MemberId = Principals_1.id ) JOIN Groups
Groups_3 ON ( Groups_3.id = CachedGroupMembers_2.GroupId )
WHERE (Principals_1.Disabled = '0') AND (ACL_4.PrincipalType =
Groups_3.Type) AND (Principals_1.id != '1') AND
(Principals_1.PrincipalType = 'User') AND (ACL_4.RightName =
'OwnTicket') AND (Groups_3.Domain = 'RT::Queue-Role') AND
((ACL_4.ObjectType = 'RT::Queue') OR (ACL_4.ObjectType =
'RT::System')) ORDER BY main.Name ASC;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+----+-------------+----------------------+--------+--------------------------------+---------------------+---------+----------------------------------+------+----------------------------------------------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
id | select_type |
table
| type |
possible_keys
|
key
| key_len |
ref
| rows |
Extra
|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+----+-------------+----------------------+--------+--------------------------------+---------------------+---------+----------------------------------+------+----------------------------------------------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
1 | SIMPLE |
main
| range |
PRIMARY
| PRIMARY
| 4 |
NULL
| 21 | Using where; Using temporary; Using filesort |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
1 | SIMPLE |
Principals_1 | eq_ref |
PRIMARY
|
PRIMARY
| 4 |
rt3.main.id
| 1 | Using where;
Distinct
|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
1 | SIMPLE | CachedGroupMembers_2 |
ref | DisGrouMem,CachedGroupMembers3 | CachedGroupMembers3 |
5 |
rt3.Principals_1.id
| 1 | Using where;
Distinct
|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
1 | SIMPLE |
ACL_4
| range |
ACL1
|
ACL1
| 54 |
NULL
| 36 | Using where; Using index;
Distinct |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
1 | SIMPLE |
Groups_3
| eq_ref | PRIMARY,Groups1,Groups2 |
PRIMARY
| 4 | rt3.CachedGroupMembers_2.GroupId
| 1 | Using where;
Distinct
|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+----+-------------+----------------------+--------+--------------------------------+---------------------+---------+----------------------------------+------+----------------------------------------------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>5
rows in set (0.04 sec)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>mysql>
select count(*) from CachedGroupMembers;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+----------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
count(*) |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+----------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
1382038 |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+----------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>1
row in set (2.56 sec)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>mysql>
show indexes from CachedGroupMembers;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+--------------------+------------+---------------------+--------------+-------------------+-----------+-------------+----------+--------+------+------------+---------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
Table
| Non_unique |
Key_name |
Seq_in_index | Column_name | Collation |
Cardinality | Sub_part | Packed | Null | Index_type | Comment |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+--------------------+------------+---------------------+--------------+-------------------+-----------+-------------+----------+--------+------+------------+---------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
CachedGroupMembers | 0 |
PRIMARY
| 1 |
id
| A |
2138547 | NULL | NULL
| | BTREE
| |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
CachedGroupMembers | 1 |
DisGrouMem
| 1 |
GroupId |
A |
2138547 | NULL | NULL | YES |
BTREE |
|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
CachedGroupMembers | 1 |
DisGrouMem
| 2 |
MemberId |
A |
2138547 | NULL | NULL | YES |
BTREE |
|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
CachedGroupMembers | 1 |
DisGrouMem
| 3 |
Disabled |
A |
2138547 | NULL | NULL
| | BTREE
| |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
CachedGroupMembers | 1 |
CachedGroupMembers3
| 1 |
MemberId | A
| 2138547 | NULL |
NULL | YES | BTREE
| |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>|
CachedGroupMembers | 1 |
CachedGroupMembers3
| 2 |
ImmediateParentId | A
| 2138547 | NULL |
NULL | YES | BTREE
| |<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>+--------------------+------------+---------------------+--------------+-------------------+-----------+-------------+----------+--------+------+------------+---------+<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>6
rows in set (0.01 sec)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>I’ve
also tried to add some indexes for this table with no results (<a
href="http://search.cpan.org/~ruz/RTx-Shredder-0.07/lib/RTx/Shredder.pm#NOTES">http://search.cpan.org/~ruz/RTx-Shredder-0.07/lib/RTx/Shredder.pm#NOTES</a>
)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>The
temporary workaround was to downgrade MySQL to 5.0.22 (Previous version in RHel
5.1) and the Query Builder is working normally again:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>mysql>
SELECT DISTINCT main.* FROM Users main CROSS JOIN ACL ACL_4 JOIN Principals
Principals_1 ON ( Principals_1.id = main.id ) JOIN
CachedGroupMembers CachedGroupMembers_2 ON (
CachedGroupMembers_2.MemberId = Principals_1.id ) JOIN Groups
Groups_3 ON ( Groups_3.id = CachedGroupMembers_2.GroupId )
WHERE (Principals_1.Disabled = '0') AND (ACL_4.PrincipalType =
Groups_3.Type) AND (Principals_1.id != '1') AND
(Principals_1.PrincipalType = 'User') AND (ACL_4.RightName =
'OwnTicket') AND (Groups_3.Domain = 'RT::Queue-Role') AND ((ACL_4.ObjectType
= 'RT::Queue') OR (ACL_4.ObjectType = 'RT::System')) ORDER BY
main.Name ASC;<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Empty
set (0.13 sec)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>But
I want MySQL 5.0.45 installed. Can anyone help on this? <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Thank
you.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal>Liviu <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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