SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Buffer Cache Hit Ratio


Buffer Cache Hit Ratio

Author
Message
charipg
charipg
SSCrazy
SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)SSCrazy (2.2K reputation)

Group: General Forum Members
Points: 2188 Visits: 1193
Buffer Cache Hit Ratio for server ABC is 83.9%.It has fallen below warning (90%) or critical (80%) threshold.

I am getting this alert message.
what is the meaning and how to resolve it.
Grant Fritchey
Grant Fritchey
SSC Guru
SSC Guru (96K reputation)SSC Guru (96K reputation)SSC Guru (96K reputation)SSC Guru (96K reputation)SSC Guru (96K reputation)SSC Guru (96K reputation)SSC Guru (96K reputation)SSC Guru (96K reputation)

Group: General Forum Members
Points: 96267 Visits: 33013
It really depends on the situation in which you are receiving it. Is the server just starting up? Then almost every single query call is going to be a cache miss, which means nothing to worry about. Are you running in an OLTP environment that only uses stored procedures for data access? Then you might be seeing some sort of memory or cache event where things were flushed. There might be things you need to do. I'd get more metrics in order to make a decision. You might be running in an ad hoc reporting environment. This might be a normal dip as a greater than average new set of queries comes in and causes cache misses.

Buffer Cache Hit Ratio is a nice measure, but it's not terribly meaningful. You need more information to decide if it means something bad or not.

----------------------------------------------------
The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood...
Theodore Roosevelt

The Scary DBA
Author of: SQL Server Query Performance Tuning and SQL Server Execution Plans
Product Evangelist for Red Gate Software
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search