Hi. I'm using squid on a high speed network (with 110M of http traffic). I'm using 2.7.STABLE7 with these cache_dir: cache_dir aufs /cache 756842 60 100 cache_dir coss /cache/coss1 65520 max-size=1048575 max-stripe-waste=32768 block-size=4096 membufs=15 cache_dir coss /cache/coss2 65520 max-size=1048575 max-stripe-waste=32768 block-size=4096 membufs=15 cache_dir coss /cache/coss3 65520 max-size=1048575 max-stripe-waste=32768 block-size=4096 membufs=15 Everything works fine most of the day, but on peak hours, I got these: 2010/08/17 20:06:59| squidaio_queue_request: WARNING - Disk I/O overloading 2010/08/17 20:06:59| squidaio_queue_request: Queue Length: current=981, high=1488, low=321, duration=170 After a while, I got a few of these, with "duration" increasing, until: 2010/08/17 20:23:09| squidaio_queue_request: WARNING - Disk I/O overloading 2010/08/17 20:23:09| squidaio_queue_request: Queue Length: current=558, high=2177, low=321, duration=531 The web browsing started to get very slow, which is when the support team took squid down. All cache_dir are on a single sata-2 7200RPM 1TB hard drive. Is there a way to know which cache_dir is the problem and what I can so this doesn't happen? I tried using both 16 and 32 AIO threads, but didn't help. cache manager tells me that I have around 10 million objects: Average HTTP requests per minute since start: 18851.1 Storage Swap size: 693535688 KB Storage Mem size: 30872 KB Mean Object Size: 64.50 KB Internal Data Structures: 10752896 StoreEntries 49 StoreEntries with MemObjects 26 Hot Object Cache Items 10752847 on-disk objects Please help! - Robert
