I took a look at the squidaio_counters page today, and saw something strange: In the Squid book, I read, on page 244: 'The cancel counter is normally equal to the close counter'. However, when I look at the statistics of my cache I see the following: open 6011915 close 463 cancel 6011881 This is Squid 2.5STABLE10 on Linux kernel 2.4.19, using aufs as cache storage scheme. Is something wrong with Squid, or is the comment in the book no longer valid for the current version of Squid? Joost