File Cache Size
Using the sliders you can define a maximum cache size in both megabytes or as a percent of the total main memory. The maximum size of the file cache is either 960 MB or the full size of the main memory itself. Should you enter in both values, the smaller value of two will be used.
You can also set a minimum value for the cache in megabytes.
A more detailed explanation of the issues surrounding caching in Windows can be found in the chapter entitled "Caching Problems in Windows".
Light System Loads
When your system experiences only minimal system loads, you can set you file cache settings very low because only a few number of files are read at any given time. Because of this, the strain on the file cache is very low.
The following is a table containing guidelines for adjusting the file cache settings according to the size of your main memory.
Size of Main Memory |
Absolute Maximum |
Relative to Available Memory |
64 MB |
24 MB |
100% |
128 MB |
48 MB |
150% |
256 MB |
96 MB |
150% |
512 MB |
192 MB |
200% |
1 GB |
348 MB |
200% |
Normal System Loads
For systems with normal system loads, it is recommended to you utilize one of the O&O AutoSense profiles. This will take care of all of the necessary adjustments.
The following is a table containing some clues regarding the file cache settings according to the size of your main memory.
Size of Main Memory |
Absolute Maximum |
Relative to Available Memory |
64 MB |
40 MB |
100% |
128 MB |
88 MB |
100% |
256 MB |
176 MB |
100% |
512 MB |
352 MB |
100% |
1 GB |
704 MB |
100% |
2 GB |
960 MB |
100% |
Heavy System Loads
If your PC or server experiences heavy system loads as a result of activities such as video editing, graphics, database, or real-time applications, it is important to consider how often and how many files are read and written on your system.
The following is a table containing guidelines for adjusting the file cache settings according to the size of your main memory.
Size of Main Memory |
Frequency of Data Access
|
Absolute Maximum |
Relative to Available Memory |
128 MB |
Low |
32 MB |
50% |
128 MB |
Often |
48 MB |
100% |
256 MB |
Low |
64 MB |
100% |
256 MB |
Often |
96 MB |
150% |
512 MB |
Low |
128 MB |
100% |
512 MB |
Often |
192 MB |
200% |
1 GB |
Low |
192 MB |
100% |
1 GB |
Often |
348 MB |
200% |
2 GB |
Low |
384 MB |
100% |
2GB |
Often |
768 MB |
200% |
File Cache Assessment Interval
O&O CleverCache monitors the use of the file cache in Windows in defined intervals. These intervals can be adjusted between 100ms and 10s.
The default value is 2.5 seconds (2500 ms), meaning that every 2.5 seconds the file cache is reassessed. Generally, this default interval is fine for normal operation. However, if you would like to change this assessment interval, select a number between 100 and 1000 ms. Please remember that too low a value can lead to a surplus load on limited resources. For this reason, this variation is only recommended on heavily loaded systems to deal with the high rate of reading and writing.
If the load on your file cache is light, it is possible to increase the assessment interval to a higher value. Because the intervals are no longer so short, however, the file cache may need to rise temporarily above the maximum value set by the user.
Note: Do not change the default settings, if you are not completely aware of the potential consequences of those changes.
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