Macbook 12" 2015 - Poor SSD Performance

Discussion in 'MacBook' started by Yamcha, Apr 23, 2016.

  1. Yamcha macrumors 68000

    Joined:
    Mar 6, 2008
    #1
    Hello Everyone!

    For some reason I'm getting very poor SSD performance with my Macbook 12" 2015, It's only about 2 months old. The speeds were fairly decent before, not sure if It's because of the storage used up.

    This is my first time using PCI based storage and I was hoping it'd sustain close to the speeds I was getting when I first bought the Macbook. According to the System Profiler Trim is enabled.
     

    Attached Files:

  2. c0mm0n macrumors member

    c0mm0n

    Joined:
    Jul 28, 2008
  3. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

    Joined:
    Aug 5, 2001
    Location:
    Denmark
    #3
    SSDs take quite a hit on speed when they are full, so, delete stuff. You'll also want free space for OS cache anyway.
     
  4. Queen6 macrumors 603

    Queen6

    Joined:
    Dec 11, 2008
    Location:
    Enjoying Better Things
    #4
    2015 512 Retina MacBook, 88.3 Gb free space of 499 available, if the free space reduces too much the SSD will definitely suffer speed loss.
    DiskSpeedTest.png

    Q-6
     
  5. ziggy29 macrumors regular

    Joined:
    Oct 29, 2014
    Location:
    Texas
    #5
    I would also suspect the SSD is too close to full, especially given the very poor write speed. I just ran this test on a Late 2008 Unibody MacBook (2.0 GHz) with a 250 GB Crucial MX200 SSD (170 GB free) and I was consistently getting write speeds more than double what you posted (overall, about 200 writing and 265 reading) -- and that's with a machine more than seven years old. If you can, copy/backup some of your files and lesser used apps to an external drive, free up some space and try it again.
     
  6. Yamcha thread starter macrumors 68000

    Joined:
    Mar 6, 2008
    #6
    Screen Shot 2016-04-24 at 11.54.54 PM.png

    I have about 20GB free.. I suspected it was due to the storage used up, but I personally haven't experience this on a traditional SSD. The performance it wasn't as drastic..
     
  7. c0mm0n macrumors member

    c0mm0n

    Joined:
    Jul 28, 2008
    #7
    18gb is shortt, but afaik it shouldn't drop that low in perf.

    What i'd do in any case
    - Make sure everything is bacuped. TM or whatever.
    - Free up some decent space (say at least 10%, the more the better, at least to locate the problem), copy files to external drive, etc...

    Than try in no particular order
    - reset PRAM / NVRAM
    - See disk status in disk utility, try the SOS (maybe)
     

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