After selecting a new value or enabling/disabling a checkbox the change is written immediately to the system registry. Make sure to create a backup of your settings before doing any modifications. All tweaks need a system reboot in order to become effective. After closing the Cacheman settings window you will get an option to reboot immediately.
Auto-Optimize can tweak all these settings automatically.
With this setting enabled Cacheman does not change the File Cache.
Cacheman will detect a low memory situation and try to prevent Paging File swapping by trimming the File Cache faster than Windows usually does.
With this option you can set the File Cache not to grow above this value.
Large System Cache
Establishes a large system cache working set that can expand to physical memory, minus 4 MBytes.
Windows has a feature for graphic and video files that creates a "Thumbnail" of the image or first frame of the video and makes it into an oversized icon for the file. There are two ways that Explorer can do this, it can create them fresh each time the folder is accessed or it can load them from a Thumbnail Cache.
Executable files have icons associated with it. Every time the shell displays a folder full of files it needs to obtain icons for each of those items. By saving icons that it has already retrieved into a cache, the shell is relieved of the need to constantly retrieve icons from executable files and icon libraries. This can make a vast difference to system performance, especially when accessing network drives. If you modify this setting the next reboot will take longer since Windows will rebuild the Icon Cache.
Dormant File Limit
Determines how many files on each share can remain open in the redirector's cache after an application has closed them. If the number of open cached files on a share exceeds the value of this entry, the system begins to close the cached files.
Unused File Cache
This number represents the percent of pool that can be consumed by unused segments. 5 is most aggressive and 40 is least aggressive setting.
Cache File Timeout
Determines how long a file can remain in the cache after it is closed. If the file is not reopened before the time indicated by the value of this entry expires, it is flushed from the Cache.
DNS Negative Cache
Determines how long a negative answer entry remains in the DNS cache.
DNS Net Failure Cache
Determines the query timeout for the DNS client when suspecting a network failure.
DNS Negative SOA Cache
Determines how long a negative DNS query SOA (Start of Authority) entry stays in the cache.
DNS Cache [IE]
This value represents the maximum number of rows in the hash table used by the DNS caching resolver service.
Note: Only prime numbers are allowed!
Internet Explorer Cache
This is the space Internet Explorer can use for temporary Internet files that are stored on your Hard Drive.
Share Cache Timeout
Determines the number of idle minutes until Windows disconnects a network share from a client.
DNS Adapter Timeout Cache
Determines how long the DNS client avoids an unresponsive network adapter.
Firefox Cache [RAM]
This is the space Firefox can use for temporary Internet files that are stored in your RAM.
Firefox Cache [Disk]
This is the space Firefox can use for temporary Internet files that are stored on your Hard Drive.
DNS Cache [Firefox]
This value represents the maximum number of rows in the hash table used by the Firefox DNS caching resolver service.