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Forum Discussion

Arie's avatar
Arie
Icon for Altostratus rankAltostratus
Aug 06, 2008

RAM Cache not working!

For some reason none of our pages are getting cached on the Big-IP.

Even a page that I pinned is not getting cached, though.

Profile settings: 

RAM Cache: Enabled 
 Max Cache Size: 60 MB 
 Max Entries: 0 
 Max Age: 600 seconds 
 Min Object Size: 500 bytes 
 Max Object Size: 150000 bytes 
 URI Caching: URI List 
 Pin List: /xyz.html 
 Include List: / 
 Ignore Headers: All 
 Insert Age Header: Enabled 
 Aging Rate: 5

As far as I can tell no iRules have any caching directives.

Any other places where caching may be turned off?

BTW, the Performance chart for the RAM Cache utilization is completely flat (0).
config
design

2 Replies

  • Arie's avatar
    Arie
    Icon for Altostratus rankAltostratus
    Aug 07, 2008
    Here's the scoop. According to the documentation, setting Max Entries to "0" means unlimited entries:

     

     

     

    Maximum Entries

     

    Specifies the maximum number of entries that can be in the RAM cache. The default is 0, which means that the system does not limit the maximum entries.

     

     

     

     

     

    However, it looks like the Big-IP (v. 9.4.3) interprets "0" as "0" (zero), and not as unlimited. Increasing the Max Entries did the trick and our pages and other elements are now being cached properly.
  • Mike_L__62783's avatar
    Mike_L__62783
    Icon for Nimbostratus rankNimbostratus
    Dec 22, 2010
    We just ran into the same issue. Is this a known bug? We are running 9.4.7. Thanks for the post.