| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Mailing Lists -> Oracle-L -> Has anybody encountered problems with HISTGRM$ ?
The DBA of one of my customers tried to run one week ago dbms_stats() to analyse all
indexed columns. The result was that all queries ended with ORA-00600. As trace files
were indicating queries on HISTGRM$ I immediately directed him to the CBO (he had not
instantly linked the cause to the effect). His workaround was to switch to RBO, with
of course side-effects. When I came to the site, I reached for my axe and cleaned up
everything using questionable means, especially against a production database (junior
DBAs, please skip the next paragraph. Socrates was sentenced to death for corrupting
the youth and I'd rather avoid the same fate).
I first looped on hist_head$ to remove all related rows in histgrm$. Before that any
query on DBA_COL_HISTOGRAMS ended in ORA-600. After the loop, to my surprise there
still were rows in histgrm$. I deleted them, and still had ORA-600 when querying
DBA_COL_HISTOGRAMS. They did not disappeared before I truncated cluster C_OBJ#_INTCOL#
(or something like this - the cluster which holds HISTGRM$).
There is no obvious sign of data block corruption; it looks more like a logical
corruption. I run the same dbms_stats() command on a copy of the database without any
problem, and I don't know where the blame should go.
Has anybody encountered anything even remotely similar? In that case, it is Oracle
8.1.7.2 on Tru64.
TIA,
Stephane Faroult
Oriole Corporation
Performance Tools & Free Scripts
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Stephane Faroul INET: sfaroult_at_oriolecorp.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-LReceived on Mon Dec 17 2001 - 05:35:18 CST
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
 |
 |