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

[Foggi, Nicola]

I forgot to include the top part with the query stats:

# Time: 100624 22:44:19
# User at Host: rt_user[rt_user] @ rt.internal [10.12.10.72]
# Query_time: 12  Lock_time: 0  Rows_sent: 8  Rows_examined: 3314678
use rt3;
SELECT DISTINCT main.* FROM Users main JOIN Principals Principals_1  ON ( Principals_1.id = main.id ) JOIN CachedGroupMembers CachedGroupMem
bers_2  ON ( CachedGroupMembers_2.MemberId = Principals_1.id ) JOIN Groups Groups_3  ON ( Groups_3.id = CachedGroupMembers_2.GroupId )  WHER
E (Principals_1.Disabled = '0') AND (Principals_1.id != '1') AND (Principals_1.PrincipalType = 'User') AND ((Groups_3.Domain = 'RT::Queue-Ro
le' AND Groups_3.Instance = '3') OR (Groups_3.Domain = 'RT::System-Role')) AND (Groups_3.Type = 'AdminCc')  ORDER BY main.Name ASC;

Is there a reason it's looking at 3314678 rows for what returns the user listing?

Nicola

2010/6/25 Foggi, Nicola <NFOGGI at depaul.edu>

>
> 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
>
>
> Discover RT's hidden secrets with RT Essentials from O'Reilly Media.
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>

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