Some of my very large tables (10 million rows) need to be analyzed by
autovacuum on a frequent basis. Rather than specifying this as a
percentage of table size + base threshold, I wanted to specify it as an
explicit number of rows.
I changed the table-specific settings so that the ANALYZE base threshold
was 5000 and the ANALYZE scale factor is 0. According to the documented
formula: analyze threshold = analyze base threshold + analyze scale
factor * number of tuples, I assumed that this would cause the table to
be analyzed everytime 5000 tuples were inserted/updated/deleted.
However, the tables have been updated with tens of thousands of inserts
and the table has still not been analyzed (according to
pg_stat_user_tables). Does a scale factor of 0 cause the table to never
be analyzed? What am I doing wrong?
I'm using PG 8.2.1.
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|Next:||From: Matthew T. O'Connor||Date: 2007-01-18 19:20:11|
|Subject: Re: Autoanalyze settings with zero scale factor|
|Previous:||From: Jeremy Haile||Date: 2007-01-18 17:28:27|
|Subject: Re: Configuration Advice|