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From Daniel Biazus <daniel.bia...@azion.com>
Subject IO performance
Date Wed, 14 Jan 2015 13:29:15 GMT
Hey Guys,

    As you can see at the following iostat output, We have a lot of writes
into the cache, :-)  and the IO wait is a bit higher than expected.

               Device:         rrqm/s   wrqm/s     r/s     w/s   rsec/s
wsec/s avgrq-sz avgqu-sz   await  svctm  %util
(storage) sda               0.00     0.00   17.00   26.00  6094.00 13144.00
  447.40     0.94   *19.77*   6.05  26.00
(interim)  sdb               0.00     0.00   85.00   13.00 12523.00
 8706.00   216.62     0.18    1.86   0.84   8.20

I was wondering if would be possible to enhance the write IO performance by
increasing the IO buffers.

I thought, I would increase the proxy.config.io.max_buffer_size, from 32768
to a much higher value.

Any thoughts about it ?

Thank you!

-- 

Daniel Biazus
infrastructure Engineering
Azion Technologies
Porto Alegre, Brasil +55 51 3012 3005 | +55 51 82279032
Miami, USA +1 305 704 8816

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