Hi,
I am monitoring CouchDB all the time and the CPU keeps around 10-12% all
the time from the erlang processes.
I do not think this is normal.
A new document is added to the DB each 5-6 minutes, but what takes CPU
time when the DB is idle?
There are very few read requests, may be 1 each 1-2 minutes or so.
Here is a screenshot from htop:
http://pho.to/9aTTK
Any ideas how can I understand what goes on?
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Kiril Stankov,
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On 08-Jul-15 12:35 AM, Kiril Stankov wrote:
Hi,
sorry, I saw the couchdb user, mistaking it for a process. Actually
what takes most of the cpu is beam.smp.
Yes, I do have some reduce functions, 90% of them are simply _count.
On the Futon status screen I see only replication jobs, which are 100%
completed.
There is nothing special in the couch.log, either.
Database sizes are very small, few Mb.
Now, it's midnight here, there is no activity whatsoever in the
application and beam.smp swings between 3 and 15% cpu.
For the last 10 hours it has 8+ hours TIME in 'top'.
Host is latest Ubuntu, Couch version is 1.6.1.
On 07-Jul-15 10:08 PM, Adam Kocoloski wrote:
Hi Kiril, no it’s not normal. Did you mean `couchjs` when you said
`couchdb`? If so it’s likely related to indexing. Do your views have
custom reduce functions? A poorly-behaved custom reduce function
(e.g. one that doesn’t really “reduce” its output) could yield very
slow indexing. Does the dashboard indicate any indexing jobs ongoing?
Adam
On Jul 7, 2015, at 1:42 PM, Kiril Stankov <[email protected]> wrote:
Hi,
I've loaded 15K docs to a single DB, with 7 views, which do not emit
docs (just id's).
Since then (4 hours now) the CPU is constantly high (~15-20%) with
most of it divided between couchdb and beam.smp.
In addition couch became significantly slower than before (when
there were ~ 3K docs).
Is that normal? Can it be related to indexing? How long can it take?
Thanks in advance.
Kiril.
