The Image Cache configuration dialog box allows for immediate view of the
image cache and permits changes to be made to its specifications. The image
cache is a memory stamp which will store in active memory or on disk the
images used in documents opened by XMayday. Images are first placed in the
active memory cache, then once that is full the system stores less
frequently-used pictures in the cache on disk. The initial specifications
of this image cache are defined in the
configuration files.
Screen shot: Image cache configuration dialog box.
Upper portion of the dialog box:
-
The "Memory Cache" section deals with the ensemble of
images contained in the active memory portion of the image cache.
-
Total "Max Memory Cache" defines the maximum size
of the image cache in memory. This value is expressed
in kilo-bytes (1024 bytes) and must be set between 0(Kb) and
100,000(Kb). Changes to the Total Memory Cache take effect
immediately. If the value 0 (Kb) is specified, the image cache
has only enough memory to hold the last image loaded.
-
The "Used Memory Cache" information text field
indicates the current amount of space occupied by the images
in the memory cache. This non-modifiable value can be greater
than the maximum total memory size of the image cache by the size
of the last image loaded.
-
The "Free Memory Cache" information text field
indicates the amount of memory space still available in the
images cache. This value is determined by subtracting used memory
cache from Total memory cache. Because the used memory can be
larger than the total size, this value can be negative.
-
The "Clean" button empties the Memory Cache.
It destroys images currently held in memory, meaning they will
require re-loading upon next use (ex. for rotation or sizing).
In order to free up memory and space, it's a good idea to empty the
memory cache when modifying a image file that will be reloaded
from XMayday.
-
The "Disk Cache" section deals with the ensemble of
images contained in the image cache stored on the hard disk.
-
The "Max Disk cache" text field defines the
maximum size of the image cache on the hard disk. This value is
expressed in kilo-bytes (1024 bytes) and must be set between 0(Kb)
and 1,000,000(Kb). Changes made to this value take effect
immediately. If a value of 0(Kb) is specified, the image cache
cannot hold anything in memory on the hard disk; the images will be
reloaded from their original file upon their next use
(ex. for rotation or sizing).
-
The "Used Disk Cache" information text field
indicates the amount of disk space currently occupied by
images. This value cannot be modified.
-
The "Free Disk cache" information text field
indicates the available free disk space in the image cache.
This value is calculated by subtracting the Used Disk Cache from the
Total Disk Cache.
-
The "Clean" button empties the disk cache.
It deletes images currently stored on the disk, meaning they will
require re-loading upon next use (ex. for rotation and sizing). In
order to free up disk space, it's a good idea to empty the disk
image cache when modifying an image file to be reloaded from
XMayday.
-
The "Save Cache before quitting" button saves the
contents of XMayday's active memory and disk caches until their
next use. If this button is not engaged, the disk cache will be deleted
when quitting XMayday in order to free up space on the hard disk.
It's a good idea to activate this button when frequently editing the
same XMayday document.
Note:
When changing display type on a server (for ex., altering display depth)
between two launchings of XMayday, it's preferable to empty the cache
before loading image contained within.
Lower portion of the dialog box:
