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Does the binary log enabling affect the MySQL performances?

Does the binary log enabling affect the MySQL performances?

2004-03-23       - By Tim Cutts

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On 23 Mar 2004, at 10:38, Enrico.Venturi@(protected) wrote:

> Hello colleagues, I 'd like to know
> IF by enabling the binary logs production I 'll affect meaningfully the
> MySQL DB performances, and
> HOW MUCH the performances are impacted

I just tested a load of a 6GB mysqldump (MyISAM tables), on an unloaded
HP AlphaServer ES45 with 8 GB of RAM, and storage on an HSV 110 SAN
device. MySQL version was 4.0.17

Without binary logging, elapsed time was:

2480 seconds

With binary logging, elapsed time was:

2502 seconds

So it 's about 1% slower, if that. I 'm logging to a different device
from the databases.

As an additional point, if I add a replication slave to the equation,
the time becomes:

2518 seconds

Which is scarcely any difference at all.

Tim

--
Dr Tim Cutts
Informatics Systems Group
Wellcome Trust Sanger Institute
Hinxton, Cambridge, CB10 1SA, UK


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