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 -------------------------------------------------------------- http://www.oriole.com, designed by Oracle DBAs for Oracle DBAs -------------------------------------------------------------- -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Stephane Faroul INET: [EMAIL PROTECTED] 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: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
