Re: Postgresql 9.2 has standby server lost data?

On 06/18/2015 05:45 PM, Paula Price wrote:
> I have Postgresql 9.2.10 streaming replication set up with log shipping in
> case the replication falls behind.  I discovered that the log-shipping had
> been disabled at some point in time.  I enabled the log shipping again.
>
> If at some point in time the streaming replication fell behind and the
> standby server was not able to retrieve the necessary WAL file(s) from the
> primary, would the standby server continue to function normally?  Do I need
> to rebuild the standby server?  I have restarted the standby server and it
> is up and running with no issues.

Well that seems at odds with it being unable to retrieve the WAL files.
This leads to these questions:

1) What makes you think it did not retrieve the WAL files via streaming?

2) What does the postgres log show at the time you restarted the standby?

   I need to know if the
> data integrity has been compromised.
>
> I have run this query to determine the lag time for the standby(in case
> this tells me anything):
> "SELECT now(), now() - pg_last_xact_replay_timestamp()  AS time_lag;
> RESULT:
> "2015-06-19 00:40:48.83701+00";"00:00:01.078616"
>
>
> Thank you,
> Paula P


--
Adrian Klaver
adrian.klaver@aklaver.com