Re: prelimiary performance comparison pgsql vs mysql

mrae@purplebat.com (Mark Rae) writes:
> On Mon, Mar 14, 2005 at 06:52:58AM -0500, Rick Schumeyer wrote:
>> Below are some PRELIMINARY results in comparing the performance of pgsql and
>> mysql.
>> ...
>> I have not yet done any testing of transactions, multiple concurrent
>> processes, etc.
>>
>
> I would say that doing the concurrency tests is probably the most
> important factor in comparing other databases against MySQL, as
> MySQL will almost always win in single-user tests.
>
> E.g. here are some performance figures from tests I have done in the past.
> This is with a 6GB databse on a 4CPU Itanium system running a mixture of
> read-only queries, but it is fairly typical of the behaviour I have seen.
> The Oracle figures also scaled in a similar way to postgres.
>
> Clients           1     2     3     4     6     8    12    16    32    64   128
> -------------------------------------------------------------------------------
> mysql-4.1.1    1.00  1.41  1.34  1.16  0.93  1.03  1.01  1.00  0.94  0.86  0.80
> pg-7.4.1       0.65  1.27  1.90  2.48  2.45  2.50  2.48  2.51  2.49  2.39  2.38

Could you elaborate on what the measures are here?  I don't quite
follow what "0.8" means as compared to "2.38."
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