High mbrc in aux_stats$
- From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 10 Mar 2006 16:44:25 -0700
Anybody seen this before?
Oracle 9.2.0.5 on AIX 5.2:
SQL> show parameter db_file_multiblock_read_count
NAME TYPE VALUE
------------------------------------ ----------- -----
db_file_multiblock_read_count integer 16
execute dbms_stats.gather_system_stats('START');
. . . run batch jobs for 8 minutes . . .
execute dbms_stats.gather_system_stats('STOP');
SQL> select * from sys.aux_stats$;
SNAME PNAME PVAL1 PVAL2
------------------------------ ------------------------------ ----------
----------------
SYSSTATS_INFO STATUS
COMPLETED
SYSSTATS_INFO DSTART
03-10-2006 14:22
SYSSTATS_INFO DSTOP
03-10-2006 14:30
SYSSTATS_INFO FLAGS 1
SYSSTATS_MAIN SREADTIM 3.864
SYSSTATS_MAIN MREADTIM 10.811
SYSSTATS_MAIN CPUSPEED 546
SYSSTATS_MAIN MBRC 97
<----???
SYSSTATS_MAIN MAXTHR 2957312
SYSSTATS_MAIN SLAVETHR -1
Notice the MBRC figure of 97 even though I have
db_file_multiblock_read_count=16. I searched Metalink for bugs and known
issues but no luck. I guess the next step is to peform a 10046 trace and check
the p3 value for all the 'db file scattered reads', but I figured I'd check to
see if any of you have already seen this before I go to that trouble.
Thanks,
Brandon
Privileged/Confidential Information may be contained in this message or
attachments hereto. Please advise immediately if you or your employer do not
consent to Internet email for messages of this kind. Opinions, conclusions and
other information in this message that do not relate to the official business
of this company shall be understood as neither given nor endorsed by it.
--
//www.freelists.org/webpage/oracle-l
Other related posts:
