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mjtsai's profile
Michael Tsai
Michael Tsai
Michael Tsai
Verified account
@mjtsai

Michael TsaiVerified account

@mjtsai

Mac Software Developer

Joined August 2007
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    Previous Tweet
    1. Michael Tsai ‏@mjtsai 29 Aug 2013

      I don’t understand why restarting the Mac speeds up Aperture so much when I have 4 GB of free RAM.

      0 replies 0 retweets 0 likes
    2. Bojan Nastic ‏@bnastic 29 Aug 2013

      @mjtsai Does "purge" command help? I find it does wonders when Safari goes over the top and takes over most of VM.

      0 replies 0 retweets 0 likes
    3. Michael Tsai ‏@mjtsai 29 Aug 2013

      @bnastic So something is getting cleared or reset when I reboot, but I’m not sure what.

      0 replies 0 retweets 0 likes
    4. Bojan Nastic ‏@bnastic 29 Aug 2013

      @mjtsai Is your Mac dual-CPU, with NUMA arch. by any chance? (wild guess)

      0 replies 0 retweets 0 likes
      Michael Tsai Verified account ‏@mjtsai 29 Aug 2013

      @bnastic Retina MacBook Pro, so I think “no.”

      11:06 AM - 29 Aug 2013
      0 replies 0 retweets 0 likes
        1. Bojan Nastic ‏@bnastic 29 Aug 2013

          @mjtsai OK, no idea then. (Remembered reading somewhere about OS X issues with memory handling on multi-cpu/numa setups)

          0 replies 0 retweets 0 likes
        2. Michael Tsai ‏@mjtsai 29 Aug 2013

          @bnastic I’m guessing related to the system disk cache, since other heavy I/O also triggers problem. Not sure why it won’t use the free RAM.

          0 replies 0 retweets 0 likes
        3. Bojan Nastic ‏@bnastic 29 Aug 2013

          @mjtsai Probably. I have similar problems on a 2012 MacBook Air, but *not* on a 2011 Mac Mini with the same workload. Can't pinpoint it yet

          0 replies 0 retweets 0 likes

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