Re: terminating autovacuum process due to administrator command

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От Radovan Jablonovsky
Тема Re: terminating autovacuum process due to administrator command
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Msg-id CAJYcdTvzoftfYKLHziRGXWqMTVevSDsMQypsjbEybBt3rzEebA@mail.gmail.com
обсуждение исходный текст
Ответ на terminating autovacuum process due to administrator command  (Radovan Jablonovsky <radovan.jablonovsky@replicon.com>)
Ответы Re: terminating autovacuum process due to administrator command  ("Albe Laurenz" <laurenz.albe@wien.gv.at>)
Список pgsql-admin
Hello,

Could you, please navigate me how to explain 2 different calculation kernel parameter SEMMNI.

In PostgreSQL documentation: http://www.postgresql.org/docs/9.1/static/kernel-resources.html#SYSVIPC is used this calculation of SEMMNI.
SEMMNI Maximum number of semaphore identifiers (i.e., sets)at least ceil((max_connections + autovacuum_max_workers + 4) / 16)

SEMMNI = ((2 * max connections) * logical partitions on the server + number of local applications (max app server connections) )
Does it make sense? And if yes why?

Sincerely,
Radovan Jablonovsky DBA

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