Hello we are testing squid-3.4.5-20140616-r13146 on - rh es 6 64 with kernel version 2.6.32-431.20.3.el6.x86_64 squid it's compiled with -- with-filedescriptors=16384 and we have found this strange behavior If I reboot the linux box we have this situation(wrong): squidclient mgr: info |grep file Sending HTTP request ... done. Maximum number of file descriptors: 1024 Largest file desc currently in use: 14 Number of file desc currently in use: 7 Available number of file descriptors: 1017 Reserved number of file descriptors: 100 Store Disk files open: 0 After this I restart the squid service and the situation(correct): squidclient mgr:info |grep file Sending HTTP request ... done. Maximum number of file descriptors: 16384 Largest file desc currently in use: 14 Number of file desc currently in use: 7 Available number of file descriptors: 16377 Reserved number of file descriptors: 100 Store Disk files open: 0 Regards, Maurizio