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Keep ~/ on the SSD
Authored by: chucky23 on Oct 12, '12 06:35:51AM

"Assuming you have the space on the SSD for the ~/Library folder (I don't), do you have a reliable way to put the Library folder on the SSD? That's because I have a ton of user documents that are NOT pictures or music (easily movable to other volumes), therefore the option to keep the user folder except those file would not work for me."

If you simply can't prune your User folder of enough stuff to make it fit on your SSD, then I would NOT recommend trying any tricks to just put ~/Library/ by itself onto the SSD. (If you do the appropriate backups, I suppose you could try to symlink that one folder to the SSD, but I haven't read any reports of folks successfully doing that, and suspect things may well break. So you could try it, but just be fully prepared for it not to work and to be able to recover your data.)

My suggestion is just for folks who CAN trim their User folder down to a size that will fit on the SSD. Doing so really will produce a very noticeable reduction in lagginess during use in many, many situations. Pretty much everything you do on the machine needs to read/write to your Caches, Application Support, and Preferences inside ~/Library/, and waiting for the platter drive for each little read/write is what causes the constant bottlenecks. Web browsing is one place of many you will see this.

For your situation, I'd recommend trying one of the many "show me what's taking up space" apps like OmniDiskSweeper to see if there is stuff in your User folder you can move out to get things to fit onto the SSD. If that doesn't do the trick, I'd recommend either buying a bigger SSD or just living with the noticeable lagginess of having ~/Library/ on the platter drive. (Disabling hibernation mode and deleting the sleepimage file will free up many GB's on the SSD, but then you have the downside of having a hard shutdown if you normally find yourself in situations where you run out of battery power.)

But the bottom line for folks is that keeping ~/Library/ on the SSD is one of the biggest bottlenecks that having an SSD can eliminate for you, and one of the biggest places it can provide a noticeable speedup during normal usage. So if you can find a way to prune and keep your User folder on the SSD, it's a very good thing to do.



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