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https://issues.apache.org/jira/browse/TS-1238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277202#comment-13277202
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Bryan Call commented on TS-1238:
--------------------------------
You can ignore the information about the average object size. That was for
disk cache. I don't know what I was thinking at the time...
After a couple days the CFLUS is getting about the same cache hit ratio as LRU.
In a five minute period it is too hard to tell. Sometimes it is better or
worse by ~.1%.
It would be nice to have a stat for the number of times that cache fails to get
a lock. I would assume there are different locks for RAM and disk cache?
Also, it is my understanding that if Traffic Server can't get a lock it will
retry a configurable number of times and go to the origin server. It might be
nice to have a stat for when this happens too.
> RAM cache hit rate unexpectedly low
> -----------------------------------
>
> Key: TS-1238
> URL: https://issues.apache.org/jira/browse/TS-1238
> Project: Traffic Server
> Issue Type: Bug
> Components: Cache
> Affects Versions: 3.1.3
> Reporter: John Plevyak
> Assignee: John Plevyak
> Fix For: 3.1.4
>
> Attachments: TS-1238-jp-1.patch
>
>
> The RAM cache is not getting the expected hit rate. Looks like there are a
> couple issues.
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