hi I'm using squid 2.5 STABLE9 in linux. I compiled squid with 32 async io threads. these days, my squid stop working with the following message shown in cache.log. 2005/04/18 10:37:01| squidaio_queue_request: WARNING - Disk I/O overloading 2005/04/18 10:37:01| squidaio_queue_request: Queue Length: current=3651, high=3651, low=321, duration=160 2005/04/18 10:37:16| ctx: exit level 0 2005/04/18 10:37:16| ctx: enter level 0: 'http://xxxxxxxxx/05/0207/03/1BV6VGSS001618FL_2.html' 2005/04/18 10:37:16| squidaio_queue_request: WARNING - Disk I/O overloading 2005/04/18 10:37:16| squidaio_queue_request: Queue Length: current=3920, high=3920, low=321, duration=175 2005/04/18 10:37:27| ctx: exit level 0 2005/04/18 10:37:27| ctx: enter level 0: 'http://xxxxxxxxx/05/0417/17/1HIAJ1TA00051CC8_4.html' 2005/04/18 10:37:27| squidaio_queue_request: Async request queue growing uncontrollably! 2005/04/18 10:37:27| squidaio_queue_request: Syncing pending I/O operations.. (blocking) I then run squid -k shutdown twice. The first time, squid complain that 2005/04/18 10:37:27| Killing RunCache, pid 10657 2005/04/18 10:37:27| kill 10657: (1) Operation not permitted and the second time, it restart instead of shutdown. Have any one got an idea what's wrong with my squid ? thx