Disk Read Latency Monitor

ID: Microsoft.SQLServer.2012.Database.DiskReadLatencyMonitor
Description: Disk Read Latency monitor for 2012 Databases. Note: This monitor is disabled by default. Please use overrides to enable it when necessary.
Target: SQL Server 2012 DB
Enabled: No

Operational States

Parameter Name	Default Value	Description	Override
Interval (seconds)	300	The recurring interval of time in seconds in which to run the workflow.
Timeout (seconds)	200	Specifies the time the workflow is allowed to run before being closed and marked as failed.
Threshold	40	Threshold
Number of samples	6	If the parameter threshold exceeding count is greater or equal to the number of samples, then the monitor will be in a bad state
Synchronization Time		The synchronization time specified by using a 24-hour format. May be omitted.

Monitor State	Message	Priority	Severity	Auto Resolution
Too high DB disk read latency (Error)	SQL DB 2012 disk read latency is too high	Medium	Critical	Yes

Name

Default

Summary

The monitor checks latency for the disk read operation and throws an alert.

This alert indicates that the average time that it takes to read data from the disk has stayed greater than threshold during an interval.

Note: This monitor is disabled by default. Please use overrides to enable it when necessary.

Causes

The problem may be caused by a disk bottleneck or disk contention.

Resolutions

To resolve this error, do one or more of the following:

Determine if disk performance has degraded or workload has increased.
Evaluate SQL Server Storage Best practices.
Determine if storage for database files has been overcommitted e.g. shared storage in SAN or Virtual Machines.

SQL Server Best Practices Article (Disk Configuration Best Practices & Common Pitfalls)

External References

This monitor does not contain any external references.