[OpenSIPS-Users] Memcache issues

Tue Feb 5 14:18:27 CET 2013

Hi, Brett!

We previously had a similar issue with the ratelimit module, but it has 
been fixed in opensips 1.8. Are you using an older version?
Can you give a little more information about the ratelimit scenario? 
What is the cachedb backend you are using for it? Is the limit shared 
among multiple instances? Can you replicate the issue?

Best regards,

Razvan Crainea
OpenSIPS Core Developer
http://www.opensips-solutions.com

On 02/05/2013 01:33 PM, Bogdan-Andrei Iancu wrote:
> Hi Brett,
>
> Vlad fixed the prefix issue with dialog profiles and Razvan will take 
> a look on the ratelimit issue. This will fix the usage with couchbase ;).
>
> It remains to investigate the memcached issue.
>
> Regards,
> Bogdan-Andrei Iancu
> OpenSIPS Founder and Developer
> http://www.opensips-solutions.com
>
> On 02/05/2013 12:32 PM, Brett Nemeroff wrote:
>> They are separate issues.
>>
>> I'm getting regular memcache errors like SYSTEM ERROR or TIMEOUT for 
>> just normal script cache_fetchs. They don't happen a whole lot, but 
>> when it does, I get like 10-15 of them all at once. And like I said, 
>> it doesn't appear to return negative so call processing kinda fails 
>> instead of letting me do the proper action when the key is missing.
>>
>> The errors I'm getting with distributed dialog profiles and 
>> ratelimiting are different. I'm using the prefix modparams for 
>> dialogs and it appears to be truncating those prefixes oddly. 
>> Ratelimiting doesn't appear to have the same prefix issue. 
>> Ratelimiting however also appears to be broken because I have a 
>> perfectly idle box showing counters in rl_list. I'm not really sure 
>> what's going on and it's hard to troubleshoot because ratelimiting 
>> inserts a very large integer to the backend and I'm not sure what it 
>> represents.
>>
>>
>>
>> On Tue, Feb 5, 2013 at 4:27 AM, Bogdan-Andrei Iancu 
>> <bogdan at opensips.org <mailto:bogdan at opensips.org>> wrote:
>>
>>     Brett,
>>
>>     I understand you are working with Vlad in troubleshooting the
>>     memcached issues.
>>
>>     But if I understand correctly, you are saying that you are also
>>     getting errors when using distributed dialog profiles but with
>>     couchbase ? If so, what kind of error you get there ?
>>
>>     Regards,
>>
>>     Bogdan-Andrei Iancu
>>     OpenSIPS Founder and Developer
>>     http://www.opensips-solutions.com
>>
>>
>>     On 02/05/2013 11:52 AM, Brett Nemeroff wrote:
>>>     Bogdan,
>>>     Increasing the -R parameter seems to have made the situation
>>>     better, but I am without question regularly running into weird
>>>     memcache timeout and system errors. I've tried several different
>>>     hardware platforms. Point to local and remote memcache servers.
>>>     Different memcache libraries and server versions. I've tried
>>>     couchbase instead of memcache and I can't get rid of the errors.
>>>     I'm really not sure what could be causing them.
>>>
>>>     When I get them, the call attempting to process fails, which is
>>>     frustrating. I'd expect that the memcache result would return
>>>     negative which would trigger a direct db query (which is written
>>>     in the script in case the cache object is missing anyway).
>>>     However it doesn't do this. It just fails and continues
>>>     processing a null return value. Is that behavior expected or a bug?
>>>
>>>     Thanks!
>>>     -Brett
>>>
>>>
>>>     On Thu, Jan 24, 2013 at 6:27 AM, Bogdan-Andrei Iancu
>>>     <bogdan at opensips.org <mailto:bogdan at opensips.org>> wrote:
>>>
>>>         Hi Brett,
>>>
>>>         We talked about this on IRC - any luck with it ?
>>>
>>>         Regards,
>>>
>>>         Bogdan-Andrei Iancu
>>>         OpenSIPS Founder and Developer
>>>         http://www.opensips-solutions.com
>>>
>>>
>>>         On 01/21/2013 11:31 PM, Brett Nemeroff wrote:
>>>>         Hey All,
>>>>         Generally I have really good luck with memcache, but for
>>>>         some reason, I'm having some issues today.
>>>>
>>>>
>>>>         Once I crank this one box up with load, I start to see
>>>>         these errors flood my logs:
>>>>
>>>>         cachedb_memcached:wrap_memcached_get: Failed to get: SYSTEM
>>>>         ERROR
>>>>         cachedb_memcached:wrap_memcached_get: Failed to get: A
>>>>         TIMEOUT OCCURRED
>>>>
>>>>         I've tired changing the tread count for memcache.
>>>>         Additional processes.. Heck, I've even tried putting
>>>>         memcache on other servers and in other colos. The original
>>>>         memcache is on the same box and is pointed at localhost
>>>>         (127.0.1.2).
>>>>
>>>>
>>>>         I'm hitting it reasonably hard, but it should keep up.
>>>>         About 10k ops a sec. I see it run great for like 2 minutes,
>>>>         then it hangs for like 4 seconds, then picks back up for
>>>>         another 30 seconds or so.. goes that like on and off.
>>>>
>>>>         Any idea of what could be wrong?
>>>>
>>>>         Thanks,
>>>>         Brett
>>>>
>>>>
>>>>         _______________________________________________
>>>>         Users mailing list
>>>>         Users at lists.opensips.org  <mailto:Users at lists.opensips.org>
>>>>         http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>
>>>
>>
>
>
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