Great work!
About a year ago I found out than config was in the very top of
profiling table. It is there again.
That time there was a small misprint that led to constant config
reloading. This time i tried to add caching since our config became so
dynamic.
My efforts can be found here: https://rev
Hi Jay,
I will take a look later when I find a box with multiple cores to take
advantage it..
Agreed - cprofiling is not so useful this case. This would be a purely
performance benchmark. If implemented correctly, we should see a
notable gain. However, It will probably not that linear because we
On 04/11/2012 04:48 PM, Yun Mao wrote:
* Database access: Each "nova list" API call will issue 4 db APIs: 3
instance_get_all_by_filters(), 1
instance_fault_get_by_instance_uuids(), so 1200 db API calls total
(note: not necessarily 1200 SQL statements, could be more). The 900
instance_get_all_by_
Just a small warning: since cProfile has its own overhead on entering/exiting
every method and uses deterministic rather than statistical profiling, it may
misrepresent tiny functions. They will take much more wall-clock time simply
due to the profiling overhead * number of executions.
I'm not s
On 04/12/2012 10:39 AM, Justin Santa Barbara wrote:
Both the profiling & the multi-process work are great - good stuff!
Jay: Won't going multi-process just make it harder to profile?
Yep, that's why I said "also note that your code profiling technique is
unlikely to be effective since cProfil
Both the profiling & the multi-process work are great - good stuff!
Jay: Won't going multi-process just make it harder to profile? I think
it's actually a good thing to profile without the multi-process patch, find
& fix and the bottlenecks in single-request performance, and then use
multi-proces
Hi Yun!
Thanks very much for sharing this information. Can I ask you to pull the
code in this branch:
https://review.openstack.org/#change,5762
And retry your test? On my test machines, the work that Huang Zhiteng
has done to convert Nova's servers to use multiple operating system
processes
Awesome, great stuff to know!
On 4/11/12 1:48 PM, "Yun Mao" wrote:
Hi Stackers, I spent some time looking at nova-api today.
Setup: everything-on-one-node devstack, essex trunk. I setup 1 user
with 10 tiny VMs.
Client: 3 python threads each doing a loop of "nova list" equivalent
for 100 times.
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