Hi Ray,
We are already using the following query:
SELECT CASE WHEN pg_last_xlog_receive_location(
) = pg_last_xlog_replay_location() THEN 0 ELSE EXTRACT (EPOCH FROM now() -
pg_last_xact_replay_timestamp()) END AS log_delay;
We cannot use pg_xlog_location_diff as we use postgresql 9.1.
Thanks a load Michael. This is really helpful.
Regards,
Granthana
On Tue, Jan 21, 2014 at 12:19 PM, Michael Paquier michael.paqu...@gmail.com
wrote:
On Tue, Jan 21, 2014 at 2:33 PM, Sameer Kumar sameer.ku...@ashnik.com
wrote:
We are already using the following query:
SELECT
Yes byte lag as well as it makes more sense.
Regards,
Granthana
Regards,
Granthana
On Tue, Jan 21, 2014 at 11:03 AM, Sameer Kumar sameer.ku...@ashnik.comwrote:
We are already using the following query:
SELECT CASE WHEN pg_last_xlog_receive_location(
) = pg_last_xlog_replay_location()
Yes we already do that. Count the number of ready wal files.
Regards,
Granthana
On Sat, Jan 18, 2014 at 9:39 PM, Sameer Kumar sameer.ku...@ashnik.comwrote:
Well in that case monitoring pending wal bytes would make more sense.
Regards
Sameer
PS: Sent from my Mobile device. Pls ignore typo
On Mon, Jan 20, 2014 at 1:53 PM, Granthana Biswas granth...@zedo.comwrote:
Yes we already do that. Count the number of ready wal files.
I guess a better place to check would be pg_stat_replication
Check this discussion:
http://www.postgresql.org/message-id/4f13ed11.6080...@gmail.com
On Tue, Jan 21, 2014 at 12:41 PM, Sameer Kumar sameer.ku...@ashnik.comwrote:
On Mon, Jan 20, 2014 at 1:53 PM, Granthana Biswas granth...@zedo.comwrote:
Yes we already do that. Count the number of ready wal files.
I guess a better place to check would be pg_stat_replication
Check this
On Tue, Jan 21, 2014 at 12:12 PM, Michael Paquier michael.paqu...@gmail.com
wrote:
Mind you, here is a simple suggestion:
SELECT application_name, pg_xlog_location_diff(sent_location,
flush_location) AS replay_delta, sync_priority, sync_state FROM
pg_stat_replication ORDER BY replay_delta
On Tue, Jan 21, 2014 at 1:30 PM, Sameer Kumar sameer.ku...@ashnik.comwrote:
On Tue, Jan 21, 2014 at 12:12 PM, Michael Paquier
michael.paqu...@gmail.com wrote:
Mind you, here is a simple suggestion:
SELECT application_name, pg_xlog_location_diff(sent_location,
flush_location) AS
We are already using the following query:
SELECT CASE WHEN pg_last_xlog_receive_location(
) = pg_last_xlog_replay_location() THEN 0 ELSE EXTRACT (EPOCH FROM now() -
pg_last_xact_replay_timestamp()) END AS log_delay;
This is (delay) not the correct thing to monitor.
We cannot use
On Tue, Jan 21, 2014 at 2:33 PM, Sameer Kumar sameer.ku...@ashnik.com
wrote:
We are already using the following query:
SELECT CASE WHEN pg_last_xlog_receive_location(
) = pg_last_xlog_replay_location() THEN 0 ELSE EXTRACT (EPOCH FROM now()
-
pg_last_xact_replay_timestamp()) END AS
Well in that case monitoring pending wal bytes would make more sense.
Regards
Sameer
PS: Sent from my Mobile device. Pls ignore typo n abb
On Tue, Jan 14, 2014 at 2:31 PM, Granthana Biswas granth...@zedo.comwrote:
Can anyone please tell me which of the following is the correct
replication lag query to find streaming replication lag in seconds?
IMHO none is 'correct'. :-)
1. SELECT extract(seconds from (now() -
On Fri, Jan 17, 2014 at 5:31 PM, Granthana Biswas granth...@zedo.comwrote:
Thank you Sameer for your reply. Is there any other query that would help
get exact replication lag?
You 2nd Query is the most accurate you can get.
2. SELECT CASE WHEN pg_last_xlog_receive_location() =
Thank you Sameer for your reply. Is there any other query that would help
get exact replication lag?
Regards,
Granthana
Regards,
Granthana
On Fri, Jan 17, 2014 at 2:46 PM, Sameer Kumar sameer.ku...@ashnik.comwrote:
On Tue, Jan 14, 2014 at 2:31 PM, Granthana Biswas granth...@zedo.comwrote:
Yes it's purely for monitoring purpose.
Regards,
Granthana
On Fri, Jan 17, 2014 at 3:29 PM, Sameer Kumar sameer.ku...@ashnik.comwrote:
On Fri, Jan 17, 2014 at 5:31 PM, Granthana Biswas granth...@zedo.comwrote:
Thank you Sameer for your reply. Is there any other query that would help
On Jan 17, 2014, at 5:07 AM, Granthana Biswas granth...@zedo.com wrote:
Yes it's purely for monitoring purpose.
I use the pg_controldata cmd locally and via bash/ssh shared keys and compare
various values that seem interesting such as Time of latest checkpoint, Latest
checkpoint location.
Hello All,
Can anyone please tell me which of the following is the correct replication
lag query to find streaming replication lag in seconds?
1. SELECT extract(seconds from (now() - pg_last_xact_replay_timestamp()))
AS time_lag;
2. SELECT CASE WHEN pg_last_xlog_receive_location() =
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