I have been testing the new Memory cache functionality, and have a few
comments (and questions). For comments, is it better to simply post
here, or should I open JIRA tickets? In any case, the first set of
comments are
1) In the 'Caching Defaults' admin screen, ideally move the general
cache setup parameters out of the 'Default Layer' section - they are not
layer specific, and having them there forces people to activate default
settings, even if they do not wish new layers to participate in caching.
2) For the 'Cache Eviction Policy' - it is not accepting the LRU and LFU
options from the list. If these will not be used for memory cache,
perhaps remove from the drop down list.
3) For the cache statistics section
a) Having both a Hit and Miss percentage is not really critical
(miss = 100 - hit)
b) For Cache Memory Occupation - it would also be nice to have the
maximum observed (in this session) level. This can be used to tell if
you need to allocate more memory for the cache.
c) I have not done extensive checking on this, but the actual
memory consumption on my Tomcat instances I am using for testing (which
are otherwise identical to a V2.7 install) are using considerably more
memory (5GB vs 2GB). This might be due to the build (debug stuff), but
the cache numbers indicated here (15MB) are only a fraction of the
delta. Either the cache is using much more than shown, or there is some
other factor.
The immediate question I have is if there is some plan to support layer
specific selection of the caching store (none, Disk, Memory, ...)? If
not, will the memory store 'Persistence enabled' mode only be global, or
can it be selected on a per-layer basis (there are no setting for this
on individual layers now)?
Thanks
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