Daniel Ockeloen wrote:
On May 12, 2006, at 10:56 AM, Ernst Bunders wrote:
Kees Jongenburger wrote:
-Hybernate is better in performance but less flexible in it's
datamodel
approach.
it's the opposite
you mean it's performace is worse but it is more flexible?????
Does anyone really know ? has anyone made say a page that collects a
few items from a form
and puts it in the cms ?. If someone has these tests why have they not
shared them ? If mmbase
is 10x slower using tags than something else with the same ease of use
we need to take hard look
at it.
Well i think there is a long standing issue with commit times in mmbase.
under certain curcomstances (I'm not sure what they are, but i have many
times witnessed the phenomena in the wild) mmbase node commit times can
exceed database commit times by factor 10. So that is a real performance
issue. I think the cache release strategy (version 0.1 as they are) do a
good job boosting performance (and also reducing db load), but they
still have to prove themselves under various circumstances.
Thats why michiel and i want to add jmeter scripts to the releases.
That may be a good dear, but you need a little more i guess. you also
need a standardized application and dataset to test on. Also creating a
test that realistically mimics what happens inside mmbase on a bussy day
is not so easy. Perhaps it is better to add more live performance
monitoring tools, so you can see what happens in the real world.
Another thing on this account is adding the ability to detect the
absence of important db indexes, or other problems that keep mmbase from
running well, and at least notify the adiministrator. but i think
extensive live monitoring possibilities would be quite the thing to find
out how well mmbase is doing. I added quite detailed performance
monitoring to the cache release strategies for that purpose.
Ernst
Daniel.
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