High CPU usage running select from dba_ts_quotas

Question

We recently installed grid agent on a DEV box and have seen out CPU spike like crazy at times. I have 10 instances running on this box (cringe), they are at different versions from 10 -11G. The agent is at 10.2.0.4.
I looked up the query that's eating my CPU and got the following:
/* OracleOEM */
SELECT 'table_space_quotas',
USERNAME,
TABLESPACE_NAME
FROM dba_ts_quotas
WHERE (max_bytes = -1
OR max_blocks = -1)
AND username NOT IN ('SYS','SYSTEM','SYSMAN','CTXSYS',
'MDSYS','ORDSYS','ORDPLUGINS','OLAPSYS',
'DBSNMP','MGMT_VIEW','OUTLN','ANONYMOUS',
'DMSYS','EXFSYS','LBACSYS','SI_INFORMTN_SCHEMA',
'SYSMAN','WKPROXY','WKSYS','WK_TEST',
'WMSYS','XDB','TRACESVR','SCOTT',
'ADAMS','BLAKE','CLARK','JONES',
'HR')
AND ROWNUM <= DECODE(:1,'-1',2147483647,
:1)
ORDER BY USERNAME
I've done some research and followed the suggestions:
There was a suggestion to set the following parameter: set optimizer_secure_view_merging=false
Disable Security Policty to monitor table spaces
Nothing seems to help.
Has anyone else experienced this?

Answer 1

I know its been a while, but though it worthwhile posting this for others viewing this post
Try the following from Metalink note #395064.1
Symptoms
The following query that is fired from Grid Control once in a day takes a lot of time and it affects the entire performance of Grid Control:
SELECT 'table_space_quotas', username, tablespace_name
FROM dba_ts_quotas
WHERE (max_bytes = -1
OR max_blocks = -1)
AND NOT username IN ('SYS', 'SYSTEM', 'SYSMAN', 'CTXSYS', 'MDSYS',
'ORDSYS', 'ORDPLUGINS', 'OLAPSYS', 'DBSNMP', 'MGMT_VIEW', 'OUTLN',
'ANONYMOUS', 'DMSYS', 'EXFSYS', 'LBACSYS', 'SI_INFORMTN_SCHEMA',
'SYSMAN', 'WKPROXY', 'WKSYS', 'WK_TEST', 'WMSYS', 'XDB', 'TRACESVR',
'SCOTT', 'ADAMS', 'BLAKE', 'CLARK', 'JONES', 'HR')
AND rownum <= decode(:1, '-1', 2147483647, :1)
ORDER BY username
Cause
The security policy run against the 10.2.0.2 database which ensures database users are allocated a limited tablespace quota is creating the problem.
Solution
- From the Grid Control home page click on Targets > Databases > select 10.2.0.2 database.
- Click on 'Metric and Policy Settings' and select 'Policies' tab.
- Now search for the Policy Rule 'Unlimited Tablespace Quota' and click on Schedule link.
- The default collection is every 24 hours. You need to disable Collection Schedule and click
continue button which will take you back to the previous page.
- Also select 'Disabled' from the drop down box available near the Policy Evaluation and click continue. After this, the security policy which ensures database users are allocated a limited tablespace quota will not run and the statement won't be executed.