On Thu, Sep 30, 2010 at 4:09 PM, Dave Page <dp...@pgadmin.org> wrote: > On Thu, Sep 30, 2010 at 8:26 PM, Robert Haas <robertmh...@gmail.com> wrote: >> Jayant Kumar did some benchmarking of InnoDB vs. PostgreSQL and PG >> came out 5 times faster. The benchmark isn't very thoroughly >> described, but it turns out not to matter. >> >> http://jayant7k.blogspot.com/2010/09/database-speed-tests-mysql-and.html >> >> Apparently, the reason we're faster is that wal_sync_method = >> open_datasync, which is the default on MacOS X, doesn't actually work. > > That might be true, but if you check the comments, Jayant replied to say: > > @Andrew : I am running linux - ubuntu 10.04 - kernel 2.6.32-24. Linux > does not support fsync_writethrough > http://www.westnet.com/~gsmith/content/postgresql/TuningPGWAL.htm > > So I don't think that invalidates his benchmark. Something else might > of course...
Oh, I missed that. Actually, I wasn't really so concerned with whether his benchmark is correct. I *am* concerned about being broken out of the box on MacOS X. (I also suspect problems with the benchmark. It's hard to believe we're 5x faster than InnoDB on an apples-to-apples comparison on trivial queries. I'd believe 20% either way, but 5x is a lot. But that's a question for another day.) -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise Postgres Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
