TAG NAME cache_mem

Description cache_mem defines the ideal amount of memory to be used for In-Transit objects, Hot Objects, Negative-Cached
objects
Build Option
 Default
Usage
 cache_mem size
Default
 cache_mem 8 MB


Synopsis

Data for these objects are stored in 4 KB blocks. This parameter specifies the ideal upper limit on the total size of 4 KB blocks allocated.

In-transit objects have priority over the others.  When additional space is needed for incoming data, Negative-cached and Hot objects will be released.  In other words, the negative-cached and hot objects will fill up any unused space not needed for In-transit objects.

If circumstances require, this limit will be exceeded. Specifically, if your incoming request rate requires more than cache_mem of memory to hold In-transit objects, Squid will exceed this limit to satisfy the new requests.  When the load decreases, blocks will be freed until the high-water mark is reached. Thereafter, blocks will be used to store hot objects.


Note
This tag does not specify the maximum process size. It places a limit on one aspect of squid’s memory usage. Squid uses memory for other things as well. Process will probably become twice or three times bigger than the value put here.


Arguments

size
 Cache memory size


Example(s)
cache_mem 32 MB