[rt-users] slow mysql query after upgrade from 3.8.6 to 3.8.8

[Ruslan Zakirov]

Hello,

Do you use SQLForACLChecks option?
Where is EXPLAIN for this query?
Show indexes from Groups table.

On Fri, Jun 25, 2010 at 8:04 AM, Foggi, Nicola <NFOGGI at depaul.edu> wrote:
>
> hey everyone,
>
> after upgrading from 3.8.6 to 3.8.8 we're getting a slow query on this
> query:
>
> use rt3;
> SELECT DISTINCT main.* FROM Users main 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 (Principals_1.id != '1') AND (Principals_1.PrincipalType =
> 'User') AND ((Groups_3.Domain = 'RT::Queue-Role' AND Groups_3.Instance =
> '3') OR (Groups_3.Domain = 'RT::System-Role')) AND (Groups_3.Type =
> 'AdminCc')  ORDER BY main.Name ASC;
> # Time: 100624 22:44:20
> # User at Host: rt_user[rt_user] @ rt.internal [10.12.10.72]
> # Query_time: 13  Lock_time: 0  Rows_sent: 1  Rows_examined: 0
> SELECT GET_LOCK('Apache-Session-dc95ab57bb8d19e23fa6fa70314e3c0e', 3600);
> # Time: 100624 22:49:28
>
> when loading any ticket page.  I've verified the cachedgroupmembers3 index
> is in place:
>
> show index from CachedGroupMembers;
> ...
> | CachedGroupMembers |          1 | CachedGroupMembers3 |            1 |
> MemberId          | A         |       36038 |     NULL | NULL   | YES  |
> BTREE      | NULL    |
> | CachedGroupMembers |          1 | CachedGroupMembers3 |            2 |
> ImmediateParentId | A         |       36038 |     NULL | NULL   | YES  |
> BTREE      | NULL    |
>
>
> but still extremely slow... any ideas?  it's pretty bad...
>
> Nicola
>
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>



-- 
Best regards, Ruslan.