14 January 2022

Replication Publisher Latency

by Grant Fritchey

502 0 Replication

Metrics install automatically if you have Redgate Monitor installed.

If you are using Redgate’s SQL Server monitoring tool, Redgate Monitor, you can instantly install and run this metric on your servers.

Query sp_replcounters on each Publisher to get the latency for that publication. If the value is above a defined threshold, raise an alert. Output is in seconds.

Metric definition

Name

Description

The T-SQL query that will collect data


		
			
			
Transact-SQL
			
			create table #replcounters
([Database] sysname,
[Replicated transactions] int,
[Replication rate trans/sec] float,
[replication latency (sec)] float,
Replbeginlsn binary(10),
Replnextlsn binary(10));
INSERT INTO #replcounters
EXEC sp_replcounters;
SELECT t.[replication latency (sec)]
FROM #replcounters as t;
drop table #replcounters;
			
				
					
				
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						create table #replcounters
([Database] sysname,
[Replicated transactions] int,
[Replication rate trans/sec] float,
[replication latency (sec)] float,
Replbeginlsn binary(10),
Replnextlsn binary(10));
INSERT INTO #replcounters
EXEC sp_replcounters;
SELECT t.[replication latency (sec)]
FROM #replcounters as t;
drop table #replcounters;

Instances to collect from

Only those with Publishers

Databases to collect from

Only those with Publishers

Collection frequency

5 minutes

Use collected or calculated values

Leave the Use a calculated rate of change between collections check box unchecked

Metric collection

ENABLED

Alert definition

Alert name

Replication Latency Too High

Description

This database has experienced high dispatch latency in replication

Raise an alert when the metric value goes

above the defined threshholds

Default threshold values

High:	10
Medium:	5
Low:

Raise an alert when the threshold is passed for

1 time collections

Alert is

DISABLED

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What are custom metrics?

The Redgate Monitor custom metric feature lets you run T-SQL queries against your SQL Servers to collect specific data. You can analyze and receive alerts about your custom data just like everything else Redgate Monitor collects.

But what if you don’t want to write your own queries? No problem. Redgate has brought together a range of quality custom metrics for you to use in Redgate Monitor, which are all are free, tried and tested. You can install straight away, and use the resources on this site to help you write your own.

What is Redgate Monitor?

Redgate Monitor is a SQL Server performance monitoring tool that gives you real-time and historical SQL Server performance data with alerts and diagnostics.

With its embedded expertise from SQL Server experts and MVPs, it gives you the information and advice you need to find and fix issues before users are even aware.

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Replication Publisher Latency

Metric definition

Name

Description

The T-SQL query that will collect data

Instances to collect from

Databases to collect from

Collection frequency

Use collected or calculated values

Metric collection

Alert definition

Alert name

Description

Raise an alert when the metric value goes

Default threshold values

Raise an alert when the threshold is passed for

Alert is

What are custom metrics?

What is Redgate Monitor?

Featured custom metrics

Total database file size

Number of active backups and restores

Full backup to odd path

Find metrics