From: | "David Shadovitz" <david(at)www(dot)shadovitz(dot)com> |
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To: | pgsql-performance(at)postgresql(dot)org |
Cc: | david(at)shadovitz(dot)com |
Subject: | Why is VACUUM ANALYZE <table> so slow? |
Date: | 2003-12-09 21:14:44 |
Message-ID: | 20031209211444.M99946@www.shadovitz.com |
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Lists: | pgsql-performance |
I'm running PG 7.2.2 on RH Linux 8.0.
I'd like to know why "VACUUM ANALYZE <table>" is extemely slow (hours) for
certain tables. Here's what the log file shows when I run this command on
my "employees" table, which has just 5 columns and 55 records:
VACUUM ANALYZE employees
DEBUG: --Relation employees--
DEBUG: index employees_pkey: Pages 2; Tuples 55: Deleted 0.
CPU 0.00s/0.00u sec elapsed 0.00 sec.
DEBUG: index emp_dept_id_idx: Pages 2; Tuples 55: Deleted 0.
CPU 0.00s/0.00u sec elapsed 0.00 sec.
DEBUG: index emp_emp_num_idx: Pages 2; Tuples 55: Deleted 0.
CPU 0.00s/0.00u sec elapsed 0.00 sec.
DEBUG: recycled transaction log file 00000000000000CC
DEBUG: geqo_main: using edge recombination crossover [ERX]
(When I get a chance I will enable timestamping of log file entries.)
Thanks for any insight. Please reply to me personally (david(at)shadovitz(dot)com)
as well as to the list.
-David
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