Ok mate the scenario is as follows:
Clients -->> Mikrotik Router -->Squid BOX
Traffic of port 80 is Natted on the MK router to the Squid Box.
Squid is installed on Debian lenny. Debian is running on an intel
SSR212MMC2 system with the following specs:
32GB of Rams
8Terra Hard Disk on a HW RAID controller each 4hds are RAID10 and
mounted as 2 cache directories
cache1 & cache2
/dev/sdc1 1.8T 87G 1.7T 5% /cache1
/dev/sdd1 1.8T 87G 1.7T 5% /cache2
pr0xySRV:~# free -m
total used free shared buffers cached
Mem: 32242 32065 176 0 1361 7570
-/+ buffers/cache: 23133 9109
Swap: 1898 0 1897
squid conf:
cache_dir aufs /cache1 1335043 16 256
cache_dir aufs /cache2 1335043 16 256
cache_swap_low 90
cache_swap_high 95
cache_replacement_policy heap LRU
memory_replacement_policy heap LRU
The problem is as you can check the previously attached Graph .. the
Small tick at an hourly interval.... and the Problem started to appear
When we had 100GB of cache as a sum of both cache_dir
