Whats "squid -v" show? The POSIX AIO support in Squid isn't all that crash hot at the moment, COSS + threads works better. Adrian 2008/8/23 Ramon Moreno <rammor1@xxxxxxxxx>: > Hello Squid Gurus, > > Can someone please shed some light on the below error? > > 2008/08/22 12:22:49| WARNING: out of aiocb slots! > > I am using COSS with the following options: > max-size=16384 block-size=2048 max-stripe-waste=16384 membufs=500 > > Thanks! > >