Managing Cache Garbage Collection

The cachegc utility allows you to clean up the cache database of objects may have expired or are too old to be cached in the directory due to cache size constraints.

Ensure that the CacheGC is not running in the proxy instance when the cachegc utility is used.

The cachegc utility can be used in the following way:

cachegc -f leave-fs-full-percent -u gc-high-margin-percent -l gc-low-margin-percent -e 
	extra-margin-percent -d conf-dir

For example:

cachegc -f 50 -u 80 -l 60 -e 5 -d server_root/proxy-serverid/config

where

• leave-fs-full-percent determines the percentage of the cache partition size below which garbage collection will not go

• gc-high-margin-percent controls the percentage of the maximum cache size that, when reached, triggers garbage collection

• gc-low-margin-percent controls the percentage of the maximum cache size that the garbage collector targets

• extra-margin-percent is used by the garbage collector to determine the fraction of the cache to remove.

• conf-dir is the configuration directory of the proxy instance. It is located in the following path server_root/proxy-serverid/config.