| From: | Tatsuo Ishii <ishii(at)sraoss(dot)co(dot)jp> |
|---|---|
| To: | tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Questions regarding signal handler of postmaster |
| Date: | 2016-12-27 00:22:11 |
| Message-ID: | 20161227.092211.455348995553502281.t-ishii@sraoss.co.jp |
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| Lists: | pgsql-hackers |
> I encountered that problem with postmaster and fixed it in 9.4.0 (it's not back-patched to earlier releases because it's relatively complex).
>
> https://www.postgresql.org/message-id/20DAEA8949EC4E2289C6E8E58560DEC0@maumau
>
>
> [Excerpt from 9.4 release note]
> During crash recovery or immediate shutdown, send uncatchable termination signals (SIGKILL) to child processes that do not shut down promptly (MauMau, Álvaro Herrera)
> This reduces the likelihood of leaving orphaned child processes behind after postmaster shutdown, as well as ensuring that crash recovery can proceed if some child processes have become “stuck”.
Looks wild to me:-) I hope there exists better way to solve the problem...
Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp
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