2 Dec
2017
2 Dec
'17
10:50 a.m.
Hello,
hash size does not set any limitation to the number of dialogs (active
calls), it has impact on searching the dialogs, so if you have a lot of
active calls, increasing the hash size might improve performances.
Effectively the hash size is used to compute the number of slots (aka
buckets) the hash table is going to have, see more technical details
about hash tables at:
- https://en.wikipedia.org/wiki/Hash_table
Can you elaborate on your statement:
but even setting the hash size to a very tiny number
does stop me from
creating hundreds of dialogs
Do you mean you are not able to create as many dialogs as you want?
Cheers,
Daniel
On 01.12.17 19:54, Mark Blackford wrote:
> Hello,
>
> I am trying to properly size the use of the Dialog Module hash for our
> implementation using:
>
> modparam("dialog", "hash_size", <number that is power of
two>)
>
> However, in my testing, I have been unable to figure out the
> relationship between the hash size and a number of dialogs I need to
> support. I think the hash size is specifying a memory block in kB,
but even setting the hash size to a very tiny number
does stop me from
> creating hundreds of dialogs.
>
> Is there a way to determine a relationship between the hash size and a
> rough number of dialogs that would be expected?
>
> An example of a a dialog looks like this from kamctl:
>
> [root@kamailio01 ~]# kamctl dialog show
> dialog memory records
> dialog:: hash=22:70
> state:: 4
> ref_count:: 2
> timestart:: 1512151205
> timeout:: 36083666
> callid::
>
0gQAAC8WAAACBAAALxYAAClws2wyL8GE+CSgRY7HIhmg9ZUIISZad46ntOPng3iPIcLaxzLFaytRTI7M0Bzz0g--(a)10.155.8.40
>
<mailto:0gQAAC8WAAACBAAALxYAAClws2wyL8GE%2BCSgRY7HIhmg9ZUIISZad46ntOPng3iPIcLaxzLFaytRTI7M0Bzz0g--@10.155.8.40>
> from_uri:: sip:b53667d44239457fbc94fc2f4c4e25a6@sip.dcs-staging.net
> <mailto:sip%3Ab53667d44239457fbc94fc2f4c4e25a6@sip.dcs-staging.net>
> from_tag:: 10.155.8.40+1+689d7e5e+8fcf481a
> caller_contact::
> sip:43f0ae1480846185e8803f21e9f2b721@10.155.8.40:5060;transport=udp
> caller_cseq:: 24115
> caller_route_set::
> caller_bind_addr:: udp:10.155.8.11:5060 <http://10.155.8.11:5060>
> callee_bind_addr:: udp:10.155.8.11:5060 <http://10.155.8.11:5060>
> to_uri:: sip:2052773090@sip.dcs-staging.net
> <mailto:sip%3A2052773090@sip.dcs-staging.net>
> to_tag:: sip+1+bdcd0004+2038f37c
> callee_contact::
> sip:ca2013e84f10348a1cc825c12562bde7@10.155.8.40:5060;transport=udp
> callee_cseq:: 0
> callee_route_set::
>
>
>
> Thanks!
> --
> Mark Blackford
> Digium Cloud Services
> 678.230.8769
>
>
>
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--
Daniel-Constantin Mierla
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