I'm tuning for the hr.
update entities are fast
entities with 3 properties add, delete 149ms 101cpu_ms 84api_cpu_ms
(tested over more days)
entities with 25 properties
http://code.google.com/p/relat/source/browse/trunk/relat/e-comm/contactmodel.py
add, delete 1825cpu_ms 1807api_cpu_ms (tested over more days)
it also depend on what properties
http://code.google.com/p/relat/source/browse/trunk/relat/e-comm/journmodel.py
2160cpu_ms 2142api_cpu_ms (tested over more days)
i have taken out the properties which are not necessary at the moment.
(into new kinds)
All cud actions are done by taskqueque
gr
wim
2011/2/8 Simon Knott knott.si...@gmail.com:
I've already posted this on the Java GAE group, but maybe someone has
seen this issue on a Python-hosted app.
I'm carrying out some testing of my app against the HR-store, instead
of the M/S datastore, and I've noticed that occasionally I'll get a
request which has a massive CPU spike. These spikes consume
~30-40seconds of CPU time, when my usual request times are ~500ms.
I'd assumed that something must be fundamentally wrong with my
application against the HR datastore, but I've now had three requests
to AppStats which have the same problem and one of them was an
image!
For example:
/appstats/static/app_engine_logo_sm.gif 200 131ms 31811cpu_ms
--- Image?!
/appstats/stats 200 536ms 32375cpu_ms
/appstats/stats 200 169ms 23878cpu_ms
Yesterday I had the request below in my log. It didn't touch the
datastore, had 6 calls to MemCache and according to AppStats had a
grand total time of 125ms.
/user/get 200 156ms 42020cpu_ms
What could cause these large CPU spikes? They aren't loading
requests, as I'm correctly getting those marked in my logs and they
are in the usual region of 2-3s duration. I also don't experience them
on the same app against the M/S datastore. My initial thoughts were
that AppStats was potentially the cause of the problem, until I saw
the request for a static image with massive CPU usage!
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gr
Wim den Ouden
Custom applications, based on Google App Engine https://e-comm1.appspot.com/
Free open source E-commerce/E-bookkeeping/E-business framework (web)
apps, http://code.google.com/p/relat/
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