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GATHER_STATS_JOB taking to much time...

edited Sep 20, 2012 1:33AM in Database Tuning (MOSC) 11 commentsAnswered
Hi,we are having problems with GATHER_STATS_JOB on our Oracle10g server, its taking to much time, and usually never finishes..
How would Oracle decide what percentage of data to sample? when checking the DBA_TABLES I found that some tables with 100 of millions of rows have sample_size equal to num_rows..
I know this is still an estimate, but does that mean that GATHER_STATS_JOB tries to compute statistics for the whole table of 100 of millions of rows? and is that one of the reasons why its taking too much time?

Regards,
Alaa

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