Dear All, I have a squid cache proxy which is delivering content to around 3000+ users. After some problems with performance on AUFS under peak hour loads I have used one of my cache_dirs as COSS disk following Amos Settings on squid-cache website while left all others as AUFS that hold files bigger than 1MB. After running perfectly for some time with coss and very beautiful results I started seeing the below messages in my cache.log file: storeCossCreateMemOnlyBuf: no free membufs. You may need to increase the value of membufs on the /cache3/coss1 cache_dir here are my squid.conf settings: cache_dir coss /cache3/coss1 110000 max-size=1048575 max-stripe-waste=32768 block-size=8192 membufs=15 cache_dir aufs /cache1 115000 16 256 min-size=1048576 cache_dir aufs /cache2 115000 16 256 min-size=1048576 cache_dir aufs /cache4/cache1 240000 16 256 min-size=1048576 Please note all my Hdds are SAS 15k drives sizes as follows: /cache1 147GB /cache2 147GB /cache3 147GB /cache4 450GB The system is dual Xeon quad core intel server with 16GB of physical Ram Do you think I should increase the membufs value and what do you think the best or optimal value for a such system should be? Sincerely, Ragheb Rustom Smart Telecom S.A.R.L
