On Thu, Sep 07, 2006, Henrik Nordstrom wrote: > m??n 2006-09-04 klockan 11:17 -0600 skrev Brett Glass: > > Henrik: > > > > In what version of Squid was this instability introduced? Does it > > only show up in certain versions of the operating system? We have > > caches running FreeBSD 4.9 and Squid 2.5.STABLE5 (see the output of > > "squid -v" below) which are absolutely rock solid under heavy > > loads; they work so well that we have not upgraded them. > > It's always been there actually, for as long as diskd has existed. But > it only occurs when diskd is being pushed to the limits, which > indirectly means the faster Squid is the likelier the problem is seen.. And I've been testing squid-2.6 + aufs on FreeBSD 6.1 and it seems quite stable and performing (ie, not blocking on IO like it would do under FreeBSD 4.x.) Brett, could you perhaps try running Squid-2.6 + kqueue + aufs under FreeBSD 6.x ? You should notice a bit of a performance boost. I don't have high-spec enough hardware to really push things anymore but I've run polygraph over a freebsd 6.1+squid-2.6+kqueue+aufs cache with 2 IDE disks maxed out at a couple of megabytes a second and it was all rather stable. Adrian
