squidclient mgr:squidaio_counts HTTP/1.0 200 OK Server: squid/3.0.RC1 Mime-Version: 1.0 Date: Thu, 06 Dec 2007 20:19:03 GMT Content-Type: text/plain Expires: Thu, 06 Dec 2007 20:19:03 GMT Last-Modified: Thu, 06 Dec 2007 20:19:03 GMT Connection: close ASYNC IO Counters: Operation # Requests Number serviced open 1744541 1744541 close 0 0 cancel 1736382 - write 0 0 read 5261400 5261400 stat 0 0 unlink 378813 378813 check_callback 280910607 - queue 0 - Threads Status: # ID # Requests 1 0xb5b4cb90 922182 2 0xb5b8db90 921580 3 0xb5bceb90 923726 4 0xb5c0fb90 924458 5 0xb5c50b90 923600 6 0xb5c91b90 921189 7 0xb5cd2b90 923740 8 0xb5d13b90 924279 Why ASYNC IO Counters close operation is zero