|Cache::SizeAwareCache(3pm)||User Contributed Perl Documentation||Cache::SizeAwareCache(3pm)|
Cache::SizeAwareCache -- extends the Cache interface.
The SizeAwareCache interface is implemented by classes that support all of the Cache::Cache interface in addition to the limit_size and max_size features of a size aware cache.
The default cache size limiting algorithm works by removing cache objects in the following order until the desired limit is reached:
1) objects that have expired 2) objects that are least recently accessed 3) objects that expire next
use Cache::SizeAwareCache; use vars qw( @ISA ); @ISA = qw( Cache::SizeAwareCache );
Please see Cache::Cache for standard constants
- The cache has no size restrictions
Please see Cache::Cache for the standard methods
- limit_size( $new_size )
- Attempt to resize the cache such that the total disk usage is under the $new_size parameter. $new_size represents t size (in bytes) that the cache should be limited to. Note that this is only a one time adjustment. To maintain the cache size, consider using the max_size option, although it is considered very expensive, and can often be better achieved by periodically calling limit_size.
Please see Cache::Cache for the standard options
- Sets the max_size property (size in bytes), which is described in detail below. Defaults to $NO_MAX_SIZE.
Please see Cache::Cache for standard properties
- If this property is set, then the cache will try not to exceed the max size value (in bytes) specified. NOTE: This causes the size of the cache to be checked on every set, and can be considered *very* expensive in some implementations. A good alternative approach is leave max_size as $NO_MAX_SIZE and to periodically limit the size of the cache by calling the limit_size( $size ) method.
Original author: DeWitt Clinton <firstname.lastname@example.org>
Last author: $Author: dclinton $
Copyright (C) 2001-2003 DeWitt Clinton