Monty Ree schrieb: > Hello.... > > I have 4G RAM squid.. > What is the recommendable value of this variable? > > cache_mem >From the FAQ : "How much memory do I need in my Squid server? As a rule of thumb on Squid uses approximately 10 MB of RAM per GB of the total of all cache_dirs (more on 64 bit servers such as Alpha), plus your cache_mem setting and about an additional 10-20MB. It is recommended to have at least twice this amount of physical RAM available on your Squid server. For a more detailed discussion on Squid's memory usage see the sections above. The recommended extra RAM besides what is used by Squid is used by the operating system to improve disk I/O performance and by other applications or services running on the server. This will be true even of a server which runs Squid as the only tcp service, since there is a minimum level of memory needed for process management, logging, and other OS level routines. If you have a low memory server, and a large disk, then you will not necessarily be able to use all the disk space, since as the cache fills the memory available will be insufficient, forcing Squid to swap out memory and affecting performance. A very large cache_dir total and insufficient physical RAM + Swap could cause Squid to stop functioning completely. The solution for larger caches is to get more physical RAM; allocating more to Squid via cache_mem will not help." > cache_swap_low > cache_swap_high > This has nothing to do with memory; these are the values that control when your disk is purged and how much of the content will be thrown away. Please read the comments in the sample config file carefully. The defaults are reasonable; for a large cache you can use smaller numbers (there is no point in leaving 2 GB or more of your disk unused). Yours, JC
