[OpenSIPS-Users] Clarification on Auto-scaling in Opensips

[Bogdan-Andrei Iancu]

Hi,

1. See the load (per proc) related stats [1] - they are used to check 
the combined load of the procs in the same auto-scaling group

2. I would say your syslog is very slow and the overhead with extra 
logging (from level 3 to 4) is triggering the up scaling.


[1] 
https://www.opensips.org/Documentation/Interface-CoreStatistics-3-2#toc13

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
OpenSIPS eBootcamp 2021
   https://opensips.org/training/OpenSIPS_eBootcamp_2021/

On 10/21/21 3:15 PM, Saurabh Chopra wrote:
> Hi All,
>
> We have successfully tested the auto-scaling in opensips after reading 
> the blog.
> _https://blog.opensips.org/2019/02/25/auto-process-scaling-a-cure-for-load-and-resources-concerns/ 
> <https://blog.opensips.org/2019/02/25/auto-process-scaling-a-cure-for-load-and-resources-concerns/>_ 
>
>
> But, I am confused with two things,
> 1. How opensips calculates load to scale the processes UP/DOWN. Is 
> there any function that we can use to check the load or any kind of 
> xlog so that we can print in our config.
> 2. The config which i am running is scaling up the process when we are 
> adding (*log_level=4*) not for *log_level=3*. Is it specific that we 
> have to use log_level=*4*.
>
> version: opensips 3.1.0 (x86_64/linux)
> flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC, 
> Q_MALLOC, F_MALLOC, HP_MALLOC, DBG_MALLOC, FAST_LOCK-ADAPTIVE_WAIT
> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, 
> MAX_URI_SIZE 1024, BUF_SIZE 65535
> poll method support: poll, epoll, sigio_rt, select.
> svn revision: 3748:3779M
> main.c compiled on 06:18:30 Feb  1 2021 with gcc 5.4.0
>
> Below is the basic of my configuration
>
> *log_level=4
> log_stderror=no
> log_facility=LOG_LOCAL5
> memlog=2
> disable_dns_blacklist=no
>
> auto_scaling_profile = PROFILE_SIP
>  scale up to 6 on 40% for 4 cycles within 5
>  scale down to 2 on 1% for 8 cycles
>
> socket=udp:20.0.xx.xxx:5507 AS 54.227.xx.xx:5507 
> use_auto_scaling_profile PROFILE_SIP*
>
> Best Regards
> Saurabh Chopra
> +918861979979
>
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