At 05:51 PM 2/3/03 -0500, Tom Lane wrote: >wade <[EMAIL PROTECTED]> writes: >> Here is the profile information. I included a log of the session that >> generated it at the top of the gprof output. If there is any other info I >> can help you with, please let me know. > >A four-second test isn't long enough to gather any statistically >meaningful profile info. On most machines, gprof samples 100 times per >second, so realistically you need a minute or two of runtime to have >trustworthy numbers. > >Please replicate the rows in the table by a factor of ten or twenty or >so and try again. > > regards, tom lane OK, here goes again. I have tried a different table, this one with 27444 rows. In this case, the query with the regex of the form "row ~* 'regex'" runs in 1.113 seconds and the other runs in 600. The session idled for a while after the query completed if that makes a difference. Queries and explain output are included at the top of the gprof output. http://arch.wavefire.com/pgregexgmon.txt -Wade Klaver
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