On Monday 05 August 2013 21:40:40 Eliezer Croitoru wrote: > On 08/05/2013 04:47 PM, Hussam Al-Tayeb wrote: > > Would manually setting the shutdown_timeout value to over 30 seconds > > (let's > > say 180 seconds) and typing 'sync' before shutting down squid to restart > > the server help with the OS caching disk i/o issue? > > I am expecting the 3.10.5 kernel update anytime now so it would be a good > > time to test things. > > The above is kind of not really needed to my understanding. > The sync is OS level operation which squid can but not directly needs to > control. > > In this level squid actually gives the OS the swapin\swapout results to > schedule a "write" and "read" operations. > From squid point of view the "write" operation was done already once the > connection was ended and in a case that the mem_cache max size is > exceeded and the cache_dir is the only option for saving the object. > > Once you shutdown a running OS in the "nice" way not just disconnecting > the cable the OS does a sync as part of the clean shutdown. > > The reasons I can think of a file that was yet to be removed is that it > was not scheduled by the OS or squid. > What version of squid are you using? > > Eliezer squid version 3.3.8 I squid -k shutdown before restarting for kernel updates. so no bad shutdowns/poweoffs
