Which leads me onto two more questions: 1. How can I pull up information about the cache, such as the age of objects within it. 2. When allocating memory to squid, what sort of allowance should be given to leaving some free for OS file caching since I assume this is important on some level due to the disk caching...? Paul Cocker -----Original Message----- From: Colin Campbell [mailto:sgcccdc@xxxxxxxxxxxxxxxx] Sent: 07 November 2007 01:06 To: Matus UHLAR - fantomas Cc: squid-users@xxxxxxxxxxxxxxx Subject: [SPAM?] Re: Optimal maximum cache size Importance: Low Hi, On Tue, 2007-11-06 at 17:33 +0100, Matus UHLAR - fantomas wrote: > On 05.11.07 19:00, Paul Cocker wrote: > > Is there such a thing as too much disk cache? I recall seeing something on the squid-cache web site that said about 1 week is the optimal age for content. How you size the cache is a bit of a guess. I have two identical systems with 36 GBytes of cache each. One is doing about 3 times as much traffic as the other (so much for manual load balancing :-). The busy one has an LRU of 6 days while the quiet one has dropped down to about 9 days (I'm sure it was about 20 days not that long ago). That tells me they're not too bad size-wise. Both systems have just over 2,000,000 store entries. The cache_dir parameters of interest are: aufs, 19150, 46, 256. The whole theory behind squid is that it's quicker to get the object from disk than to retrieve it over the net. Getting objects from memory is nice but I wouldn't over-emphasise its importance. Colin -- Colin Campbell Unix Support/Postmaster/Hostmaster Citec +61 7 3227 6334 TNT Post is the trading name for TNT Post UK Ltd (company number: 04417047), TNT Post (Doordrop Media) Ltd (00613278), TNT Post Scotland Ltd (05695897),TNT Post North Ltd (05701709) and TNT Post South West Ltd (05983401). Emma's Diary and Lifecycle are trading names for Lifecycle Marketing (Mother and Baby) Ltd (02556692). All companies are registered in England and Wales; registered address: 1 Globeside Business Park, Fieldhouse Lane, Marlow, Buckinghamshire, SL7 1HY.
