[Sblim-issues] [ sblim-Bugs-1386191 ] sfcb memory footprint for large schemas too high

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Bugs item #1386191, was opened at 2005-12-20 15:10
Message generated for change (Comment added) made by mihajlov
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Category: sfcb
Group: Performance
>Status: Open
>Resolution: Accepted
Priority: 3
Submitted By: Viktor Mihajlovski (mihajlov)
Assigned to: Adrian Schuur (a3schuur)
Summary: sfcb memory footprint for large schemas too high

Initial Comment:
In case of large classSchema files, the memory
consumption of the class provider is too high, as the
entire class schema is loaded into memory.

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>Comment By: Viktor Mihajlovski (mihajlov)
Date: 2005-12-22 10:56

Message:
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The caching class provider seems to have a memory leak.
Needs to be verified.

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Comment By: Viktor Mihajlovski (mihajlov)
Date: 2005-12-20 15:16

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Fix by a3schuur:

Added caching ClassProviderGz.c, optionally accepting
compressed classSchemas files.
This provider does not keep complete classSchemas file in
memory 	but uses a cache instead. Cache limit is currently
set to a maximum of 16 classes. When reaching this limit the
least recently used class is removed from the cache. All
class retrieval goes through the cache except for
enumerateClasses operations, which causes enumerateClasses
operation to take longer as usual but prevents useless
flushing of cache contents. 

classProviderGz does not support createClass, modifyClass
and deleteClass operations.

classProviderGz can handle compressed (zipped) classSchemas
files as wel as non-zipped files. Zipping should be done
using the gzip program. The class provider looks for either
classSchemas or classSchemas.gz files.

Regisstation is as follows:

[$ClassProvider$]    
provider: ClassProvider	
location: sfcClassProviderGz
type: class method    
unload: never


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