Macbook 12" 2015 - Poor SSD Performance

[Yamcha]

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.

 

[c0mm0n]

How much free space ?

 

[T'hain Esh Kelch]

SSDs take quite a hit on speed when they are full, so, delete stuff. You'll also want free space for OS cache anyway.

 

[Queen6]

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.


Q-6

 

[ziggy29]

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.

 

[Yamcha]

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..

 

[c0mm0n]

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)