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dbms_stats

Home » dbms_stats

Checking column usage information using dbms_stats

  • Post author:Amit Bansal
  • Post published:6 June, 2012
  • Post category:11g/Performance
  • Post comments:2 Comments

Oracle 11gR2 DBMS_STATS introduced useful function report_col_usage to report column usage i.e if column is being used for equality,like predicates. I came to know it while reading Optimizer whitepaper .As per…

Continue ReadingChecking column usage information using dbms_stats

GATHER_STATS_JOB – Is it enabled?

  • Post author:Amit Bansal
  • Post published:18 August, 2009
  • Post category:10g/11g
  • Post comments:9 Comments

Few days back , Martin had posted a series of post on a issue where GATHER_STATS_JOB was failing silently for a large object. If you have missed it, you can…

Continue ReadingGATHER_STATS_JOB – Is it enabled?

dbms_stats.copy_table_stats does not alter low/high value

  • Post author:Amit Bansal
  • Post published:24 June, 2009
  • Post category:Performance
  • Post comments:8 Comments

I was working on a performance issue arising due to missing table stats on a new partition for large Partitioned table.This was a 10.2.0.4 database on IBM AIX 5L. So…

Continue Readingdbms_stats.copy_table_stats does not alter low/high value

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