Comments on: PostgreSQL 9.2 Master – Slave Monitoring

By: Bram van Dartel

Bram van Dartel — Tue, 03 Oct 2017 10:09:42 +0000

In reply to Bram van Dartel.

or just…

export psql=\`which psql\`
export bc=\`which bc\`

By: Bram van Dartel

Bram van Dartel — Tue, 03 Oct 2017 10:09:18 +0000

In reply to Johnny Morano.

or just…

export psql=`which psql`
export bc=`which bc`

By: Chris

Chris — Thu, 22 Jun 2017 22:31:11 +0000

In reply to emb3dd3d. you need to swap your host and slave - you might have them reversed

By: Johnny Morano

Johnny Morano — Wed, 22 Jun 2016 12:43:29 +0000

In reply to James Jaramillo. On the command line, write 'which psql' and configure that path in the script ;)

By: James Jaramillo

James Jaramillo — Fri, 17 Jun 2016 20:22:20 +0000

Hi, when I run it, I got this error. Please help to solve it. Thanks!

My operative system is debian

/opt/postgresql/bin/psql: No such file or directory
/opt/postgresql/bin/psql: No such file or directory
/opt/postgresql/bin/psql: No such file or directory
/opt/postgresql/bin/psql: No such file or directory

By: emb3dd3d

emb3dd3d — Thu, 26 Mar 2015 15:08:08 +0000

Does this work for streaming replication?.. I receive an error when trying to run. Streaming Replication has the secondary always in recovery mode.

ERROR: recovery is in progress
HINT: WAL control functions cannot be executed during recovery.
CRITICAL: Stream has no value to compare (is replication configured or connectivity problem?)

By: Johnny Morano

Johnny Morano — Sat, 21 Feb 2015 08:23:31 +0000

In reply to KOJAVA.

Where do you have ‘psql’ installed? Execute ‘which psql’ to find its location, or execute ‘locate bin/psql’ 😉

By: KOJAVA

KOJAVA — Fri, 20 Feb 2015 08:30:41 +0000

Hi, when I run it, I got this error. Please help to solve it. Thanks!

: No such file or directoryne 18: /usr/bin/psql
: No such file or directoryne 19: /usr/bin/psql
: No such file or directoryne 20: /usr/bin/psql
: No such file or directoryne 21: /usr/bin/psql
monitor_master_slave.sh: line 58: syntax error: unexpected end of file

By: Rob

Rob — Wed, 30 Apr 2014 10:53:09 +0000

This script expects that you will alwasy logon as the postgres user itself, while this is not alweays the case.

I added an extra option for the user, and edited the psql commands so it will use this user instead of the static postgres user.

export p_user=$6

master_lag=$($psql -U $p_user -h$p_host -p$p_port -A -t -c “SELECT pg_xlog_location_diff(pg_current_xlog_location(), ‘0/0’) AS offset” $p_db)
slave_lag=$($psql -U $p_user -h$s_host -p$s_port -A -t -c “SELECT pg_xlog_location_diff(pg_last_xlog_receive_location(), ‘0/0’) AS receive” $p_db)
replay_lag=$($psql -U $p_user -h$s_host -p$s_port -A -t -c “SELECT pg_xlog_location_diff(pg_last_xlog_replay_location(), ‘0/0’) AS replay” $p_db)
replay_timediff=$($psql -U $p_user -h$s_host -p$s_port -A -t -c “SELECT NOW() – pg_last_xact_replay_timestamp() AS replication_delay” $p_db)

By: dan

dan — Thu, 05 Sep 2013 11:25:39 +0000

did it and it works like a charm. cheers 🙂