Am 20.03.2012 15:27, schrieb Jim Fulton:
On Thu, Mar 15, 2012 at 11:09 AM, Jim Fulton <j...@zope.com> wrote:
On Wed, Mar 14, 2012 at 1:47 PM, Jim Fulton <j...@zope.com> wrote:
...
At some point soonish, I'll do some
tests against a large database.
On a database with 180 million records, 150 million of which
are compressable:
Compressed Compress Uncompress
Size % of time time
uncompressed microseconds microseconds
-------------------------------------------------------
zlib 38 96 12.5
lz4 52 7.4 1.6
-------------------------------------------------------
lz4 is an order of magnitude faster than zlib, however,
lz4-compressed records were 36% larger.
For me, I don't think the speedup is worth the loss of compression.
Jim
Do you have an estimation on how much of the whole store cpu time
is used for compression?
best regards,
jürgen
--
XLhost.de ® - Webhosting von supersmall bis eXtra Large <<
XLhost.de GmbH
Jürgen Herrmann, Geschäftsführer
Boelckestrasse 21, 93051 Regensburg, Germany
Geschäftsführer: Jürgen Herrmann
Registriert unter: HRB9918
Umsatzsteuer-Identifikationsnummer: DE245931218
Fon: +49 (0)800 XLHOSTDE [0800 95467833]
Fax: +49 (0)800 95467830
Web: http://www.XLhost.de
_______________________________________________
For more information about ZODB, see http://zodb.org/
ZODB-Dev mailing list - ZODB-Dev@zope.org
https://mail.zope.org/mailman/listinfo/zodb-dev
