Hi Sudheer, Thank you very much for you suggestion.
But I think ramdisk is not suitable for my case. There are many other files in the same domain, the storage requirement is larger than my ram storage. Only several of them are hot files, may I have a way to make ram_cache or linux pagecache work? Thanks in advance, Thomas. ________________________________________ 发件人: Sudheer Vinukonda [[email protected]] 发送时间: 2016年4月15日 23:47 收件人: [email protected] 主题: Re: ram_cache for big objects One approach is to use a ramdisk (e.g configure tmpfs ). On Friday, April 15, 2016 12:33 AM, ZHAOCHUNBO [赵春波] <[email protected]> wrote: HI all, I have met one problem: There is one big file(600MB) and it is very hot, it is larger than ` ram_cache_cutoff ` setup: CONFIG proxy.config.cache.ram_cache_cutoff INT 20M I have noticed that the `rKB/s` on one disk is very high, and the disk usage is keeping nearly 100%. Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sde 0.00 124.00 196.33 2.33 47210.00 505.33 480.36 35.17 182.13 5.02 99.73 It seems linux pagecache does NOT work when using ATS, and ATS ram_cache does not work either, am I correct? What is the suggestion value of `proxy.config.cache.ram_cache.size` and `proxy.config.cache.ram_cache_cutoff` ? How should I handle this case? Thanks in advance. --- Best Regards, Thomas
