Re: [Fwd: MySQL Benchmark page - Problem with vacuum() in PostgreSQL] - Mailing list pgsql-general

From Michael Widenius
Subject Re: [Fwd: MySQL Benchmark page - Problem with vacuum() in PostgreSQL]
Date
Msg-id 200108071952.f77JqaZ32158@tik.mysql.fi
Whole thread Raw
In response to Re: [Fwd: MySQL Benchmark page - Problem with vacuum() in PostgreSQL]  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: [Fwd: MySQL Benchmark page - Problem with vacuum() in PostgreSQL]  (Jan Wieck <JanWieck@Yahoo.com>)
List pgsql-general
Hi!

>>>>> "Tom" == Tom Lane <tgl@sss.pgh.pa.us> writes:

Tom> Justin Clift <justin@postgresql.org> forwards:
>> The problem was that when we run the benchmark with the --fast option,
>> which basicly does a vacuum() between after each batch of updates,
>> postmaster started to fill up disk with log files during one of the
>> vacuum() runs and didn't stop until the disk was full.

Tom> See
Tom> http://www.ca.postgresql.org/mhonarc/pgsql-patches/2001-06/msg00061.html

Tom>             regards, tom lane

Thanks!

I will look at this as soon as I am back home from my vacation and
then do a new benchmark run and update the benchmark page.

Regards,
Monty

PS: If anyone has any ideas of things that we have missed in our
    current benchmark pages, please email them to Anna so that she can
    add these to the next generation of the benchmark suite.

    Some things that I know we have missed in the single user
    benchmark are:
   - Sub select (all different forms of sub select, with a comparison
             to normal selects for those select that can be
         changed to normal selects)
   - Foreign keys (which should contain a comparison with multi-table-delete)
   - Transactions
   - Rollback

   With comparison I mean that there should be at least one test that
   makes it easy for the user to see which construct is better for
   this database.




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