postgres: lower tcp_keepalive connection settings#4027
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In some situations a half-open connections cannot be timed out using the idle_timeout, idle_in_transaction_session_timeout settings. In these cases, it is useful to have tcp_keepalive reduced to detect the error more quickly since the default is longer than 2 hours on most systems.
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jacobmarble
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Nice. Lots of tests. 👍
willdonnelly
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Description:
In some situations a half-open connections cannot be timed out using the idle_timeout, idle_in_transaction_session_timeout settings. In these cases, it is useful to have tcp_keepalive reduced to detect the error more quickly since the default is longer than 2 hours on most systems.
Changes to
TestFencingCasesto fix preexisting failure that is normally excluded by-tags nodb.Workflow steps:
(How does one use this feature, and how has it changed)
Documentation links affected:
(list any documentation links that you created, or existing ones that you've identified as needing updates, along with a brief description)
Notes for reviewers:
I was not able to duplicate this issue, but it has been reported in the wild on the server side. This doesn't add an new timeouts, so it ought to be safe. I didn't attempt to add this to source-postgres, because it didn't look like
pgconn.ParseConfigsupported these connection parameters, so perhaps we need another method there.