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I have raised the bug for this (https://bugs.launchpad.net/ceilometer/+bug/1508220)

I have checked the ceilometer-api logs when I ran the query and have not found any errors or warnings. I could see only the below two logs:

2015-10-20 17:47:06.771 84151 DEBUG ceilometer.api.controllers.v2.meters [-] computed value coming from u'(<ceilometer.storage.impl_mongodb.Connection object at 0x7f3c422c2850>,)' statistics /usr/lib/python2.7/dist-packages/ceilometer/api/controllers/v2/meters.py:407
2015-10-20 17:47:06.773 84151 INFO werkzeug [-] 192.168.0.3 - - [20/Oct/2015 17:47:06] "GET /v2/meters/vcpe.dns.cache.size/statistics HTTP/1.1" 200 -

Thanks
Srikanth



-----Original Message-----
From: gord chung [mailto:gord at live.ca] 
Sent: Tuesday, October 20, 2015 1:39 PM
To: openstack-dev at lists.openstack.org
Subject: Re: [openstack-dev] [Ceilometer] "Infinite" values for "sum" and "average" fields in statistics query

could you open a bug on
https://bugs.launchpad.net/ceilometer/+bugs?orderby=-id&start=0 and reference this thread

i would also check to see if ceilometer-api logs have any noticeable warning/errors. it's possible a datatype is being restricted there as well.

thanks

On 20/10/2015 12:22 PM, Srikanth Vavilapalli wrote:
> Hi
>
> I am using MongoDB backend.
>
> Thanks
> Srikanth
>
> -----Original Message-----
> From: gord chung [mailto:gord at live.ca]
> Sent: Tuesday, October 20, 2015 9:20 AM
> To: openstack-dev at lists.openstack.org
> Subject: Re: [openstack-dev] [Ceilometer] "Infinite" values for "sum" 
> and "average" fields in statistics query
>
> which backend are you using? this potentially may be a bug where we're hitting some size limit restricted by datatype.
>
> On 19/10/2015 4:02 PM, Srikanth Vavilapalli wrote:
>> Hi
>>
>> I have observed "inf" values for "sum" and "average" fields in a ceilometer statistics query on one of my custom meter as shown below. I have also verified the samples query for this meter and there are 1544 samples (output shown below) with all of them having value as "150.0". So ideally the "Avg" filed should be "150.0" in this scenario. Could anyone tell me in what scenario we will see these two fields as "inf" in the meter statistics query? Plz let me know if you need more details or logs here. Appreciate your help.
>>
>> Thanks
>> Srikanth
>>
>>
>> svavilap at ctl:/usr/lib/python2.7/dist-packages/ceilometer$ ceilometer 
>> statistics --meter=vcpe.dns.cache.size
>> +--------+----------------------------+----------------------------+-------+-------+-----+-----+-------+------------+----------------------------+----------------------------+
>> | Period | Period Start               | Period End                 | Max   | Min   | Avg | Sum | Count | Duration   | Duration Start             | Duration End               |
>> +--------+----------------------------+----------------------------+-------+-------+-----+-----+-------+------------+----------------------------+----------------------------+
>> | 0      | 2015-10-17T01:30:24.999000 | 2015-10-19T17:47:20.587000 | 150.0 | 150.0 | inf | inf | 1544  | 231415.588 | 2015-10-17T01:30:24.999000 | 2015-10-19T17:47:20.587000 |
>> +--------+----------------------------+----------------------------+-------+-------+-----+-----+-------+------------+----------------------------+----------------------------+
>>
>>
>> svavilap at ctl:/usr/lib/python2.7/dist-packages/ceilometer$ ceilometer 
>> sample-list --meter=vcpe.dns.cache.size
>> +-------------+---------------------+-------+--------+---------+----------------------------+
>> | Resource ID | Name                | Type  | Volume | Unit    | Timestamp                  |
>> +-------------+---------------------+-------+--------+---------+----------------------------+
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-19T17:47:20.587000 |
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-19T17:47:00.048000 |
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-19T17:42:20.470000 |
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-19T17:41:59.921000 |
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-19T17:37:20.362000 |
>> .
>> .
>> .
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-17T01:50:25.499000 |
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-17T01:45:46.255000 |
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-17T01:45:25.374000 |
>> | vcpe-170    | vcpe.dns.cache.size | gauge | 150.0  | entries | 2015-10-17T01:40:46.131000 |
>>
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> gord
>
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