Determining if your operating system is causing memory issues within your SQL Server instance can be a challenge. One way around it is to use the sys.dm_os_ring_buffers to show when server memory is low. Read more
Determining if your SQL Server instance is experiencing memory issues within the SQL Server Virtual Address Space (VAS) can be a challenge. One way around it is to use the sys.dm_os_ring_buffers. Read more
This metric measures the amount of memory used in the buffer cache by the largest object (based on the number of pages). It checks the sys.dm_os_buffer_descriptors to identify the object, and returns the relative percentage used. Read more
The number of out of memory errors that have occurred within a rolling five minute window. If you just want to keep an eye out for any memory errors, you can watch the ring buffers for the Out of Memory error alert when it gets registered there. Read more
Trying to determine if you have pressure in your buffer allocations can be difficult. Buffer cache hit ratio is an almost useless metric, so you need a mechanism to let you know if there’s a problem in that area. Read more
This metric specifies the total amount of dynamic memory, in kilobytes (KB) the server is using for the dynamic SQL plan cache. Read more
What are custom metrics?
The SQL 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 SQL 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 SQL 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.
This metric returns the number of non-Microsoft modules loaded into the SQL Server address space. Having a lot of modules loaded into the address space can cause performance issues in SQL Server. This metric lets you keep an eye on how many modules you have, other than those created by Microsoft. Thanks to Nicolaas Botes for […] Read more
This metric and alert will notify you when a SQL Server instance is restarted for any reason. The value returned by the metric is not useful on its own, and is only used by the alert to detect changes. When the server has not been restarted it will report 0 , and when the server […] Read more