Can large text documents degrade Spotlight performance?

Discussion in 'OS X Yosemite (10.10)' started by ProbonoBonobo, Jan 12, 2015.

  1. ProbonoBonobo macrumors newbie

    Jan 12, 2015
    I have somewhere in the range of 5-10GB of text files saved to disk. This includes, notably, a large corpora of documents intended primarily for use in NLP applications. One feature that may be worth noting about these documents is that many consist solely of unique words and misspellings, comprising a vast set of strings, over a search space that is somewhat resistant to compression (lots of entropy).

    Could having large amounts of text data on one's MBP noticeably degrade Spotlight performance? It has been running unusually slow lately, and I'm unsure whether the issue is related to memory management (I have 8GB) or simply the size or characteristics of the search space.
  2. simonsi macrumors 601


    Jan 3, 2014
    Wouldn't have thought so but to confirm go into Preferences/Spotlight/Privacy and select the folder(s) where your 10GB of text is and exclude it from Spotlight searching completely.

    Next time the system runs slow, go into Activity Monitor and see what is chewing CPU or hammering RAM, then you won't need to guess. If you can't pin it down, boot into Safe Mode, that will stop your login items loading and you can then tell if it is one of them causing the issue.

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