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Add condition variable for walreceiver shutdown.

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Use this new CV to wait for walreceiver shutdown without a sleep/poll
loop, while also benefiting from standard postmaster death handling.

Discussion: https://postgr.es/m/CA%2BhUKGK1607VmtrDUHQXrsooU%3Dap4g4R2yaoByWOOA3m8xevUQ%40mail.gmail.com
This commit is contained in:
Thomas Munro
2021-03-12 19:07:27 +13:00
parent 600f2f50b7
commit de829ddf23
6 changed files with 41 additions and 13 deletions
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4
doc/src/sgml/monitoring.sgml
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@ -1766,6 +1766,10 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
<entry>Waiting for confirmation from a remote server during synchronous
replication.</entry>
</row>
<row>
<entry><literal>WalrcvExit</literal></entry>
<entry>Waiting for the walreceiver to exit.</entry>
</row>
<row>
<entry><literal>XactGroupUpdate</literal></entry>
<entry>Waiting for the group leader to update transaction status at