At 04:48 PM 6/30/2005, Henrik Nordstrom wrote: >It is planned to implement a real RAM based cache in Squid, it just isn't >really there yet.
It would help as we move toward peak traffic levels of 500 to 1000 hits per second. At that level, even a cache with multiple drives becomes noticeably disk-bound. Right now, adding RAM doesn't help, because popular objects don't wind up there unless they're new. We were baffled as to why the extra RAM wasn't helping until we did some tests and saw that the TCP_HITs weren't followed by TCP_MEM_HITs on the same URLs. We could create a "memory disk," but populating it is awkward. --Brett Glass
