[squid-users] Squid overloading when RAID drive cache in use?

[Peter Smith]

I am wondering if having cache_dir drives on a RAID controller that has 
Read/Write cache turned on might cause problems?  I'm fairly sure that 
Squid manages the latency, etc of its cache_dir drives.  The drives that 
my Squids use are all on RAID controllers as single volumes.  However I 
recently found that if I enable Read/Write cache on the cache_dir drives 
that load on the processor goes off the scale.  Could it be that Squid 
gets such a quick response from the drive that it thinks the drive is 
super fast and thus slams it, causing it to run out of Read/Write cache 
and then gets overloaded as the requests backlog?  I'm hoping that this 
would explain a number of my Squid servers that can be very unstable.  
The cache I'm talking about is in the order of only about 128MB worth, 
and from 3-4 cache_dir drives.

Peter Smith