there is a blog in Chinese by 仝渊, which may help you calculate the memory needed by ATS: https://blog.zymlinux.net/index.php/archives/1038 <https://blog.zymlinux.net/index.php/archives/1038>
well, you have big storage, then you want to cache big files? if so, please increase the average size, that will help reduce the index memory. FYI - Yongming Zhao 赵永明 > 在 2014年11月15日，上午10:32，Lerner, Steve <[email protected]> 写道： > > James, > > Makes perfect sense- thanks! In the mix of ye olde alchemy are there any > favorite levers to pull for ATS that are known to impact overall RAM use? > > We won’t bother the list anymore about this after this question J Thanks for > the help! > > -Steve > > Steve Lerner | Sr. Member of Technical Staff, Network Engineering | M 212 495 > 9212 | [email protected] <mailto:[email protected]> | Skype: steve.lerner > <image001.jpg> > > From: James Peach [mailto:[email protected]] > Sent: Friday, November 14, 2014 7:07 PM > To: [email protected] > Subject: Re: proxy.config.cache.ram_cache.size query from eBay > > > > On Nov 13, 2014, at 6:40 PM, Lerner, Steve <[email protected] > <mailto:[email protected]>> wrote: > > Hi gang- Phil Sorber referred me to this list. > > We are setting up clusters of Apache Traffic Server to beef up the front end > of our image services which are… large in terms of volume… to say the least. > We hope to be the big users of ATS and be a strong reference customer- so any > help with is appreciated! > Our first test cluster consistes of 23 machines, ubuntu12.04, Intel(R) 2x > Xeon(R) CPU E5-2670 v2 @ 2.50GHz, 128G ram, 95T disk > > Here is our query: > > We are setting records.config as: CONFIG proxy.config.cache.ram_cache.size > INT 64G > > But we find that trafficserver ignores this limit and grows at the default > rate of 1MB RAM / 1GB disk. > > proxy.config.cache.ram_cache.size just sets how much memory to use in the RAM > cache, as YongMing points out, there's lots of other things in the system > that will consume RAM. Unfortunately tuning the RAM usage seems to be a bit > of a black art :-/ > > > > Example of a current process: > > traffic_line -r proxy.config.cache.ram_cache.size returns 68,719,476,736 > Which is about 64GB- correct! > > But looking at the process: > > 86050 nobody 20 0 108g 102g 4912 S 54 81.3 1523:33 > /ebay/local/trafficserver/bin/traffic_server -M --httpport 80:fd=7 > > So basically we’ve set the process to only consume 64GB but its consuming > 108GB… > > Does anyone have any ideas on why this happens or a way to fix it? > We want to have constrained RAM but tons of disk- we’d much rather have the > cache serve from disk then start swapping RAM > > Thanks in advance, > > Steve > > Steve Lerner | Sr. Member of Technical Staff, Network Engineering | M 212 495 > 9212 | [email protected] <mailto:[email protected]> | Skype: steve.lerner > <image001.jpg>
