Retrieive vsz_limit programatically

[Timo Sirainen]

Do you want to find out the service/process's own vsz_limit or another service's vsz_limit? Own vsz_limit would be easiest to get with getrlimit(RLIMIT_AS) as Aki said. If you want another service's vsz_limit that's not easily possible, because those settings just aren't sent to anything except the master process. struct service_settings in general isn't accessible to anything except the master process. The only alternative would be to ask service/indexer/vsz_limit setting either via doveconf or by connecting to the "config" socket. master_service_settings_read() could be used to do these. However, that's likely overly complicated for whatever you're planning.

> On 21. Nov 2021, at 14.27, Joan Moreau <jom at grosjo.net> wrote:
> 
> ok but this does not consider the vsz_limit of the service (indexer in my case)
> 
> only the "default_vzs_limit" is given
> 
> 
> 
> 
> 
> On 2021-11-21 13:14, Aki Tuomi wrote:
> 
>> Dovecot master process uses setrlimit to enforce the limit, so you should be able to get it with RLIMIT_AS or RLIMIT_DATA, iirc it depends a bit on os which is used.
>> 
>> I dont think service->vsz_limit is available on the service itself.
>> 
>> Aki
>> 
>> 
>> On 21 November 2021 12.20.16 UTC, Joan Moreau <jom at grosjo.net> wrote:
>> In the dovecot source, I see "service->vsz_limit" giving the answer
>> 
>> How to reach the "service" object from within a plugin ?
>> 
>> 
>> 
>> On 2021-11-21 12:15, Joan Moreau wrote:
>> 
>> Hi
>> 
>> This does not really work
>> 
>> Putting
>> 
>> service indexer-worker {
>>         vsz_limit = 1G
>> }
>> 
>> Getrlimit returns "-1"
>> 
>> 
>> 
>> Is there a proper function giving the actual  process size (memory used) and limit (vsz_limit, either process of default_vsz_limit, as applicable) ?
>> 
>> 
>> 
>> On 2021-11-21 07:09, Aki Tuomi wrote:
>> 
>> You could try getrlimit RLIMIT_AS.
>> 
>> Aki
>> 
>> On 20 November 2021 17.22.17 UTC, Joan Moreau <jom at grosjo.net> wrote:
>> Hello
>> 
>> 
>> 
>> How to get, programatically (C/C++), the value of teh dovecot.conf file of vsz_limit and default_vsz_limit ?
>> 
>> Thank you
>> 
>> 
>> 

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