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:
 

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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  %utilsde               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  

  

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