Probably not much of interest (16.04 Ubuntu)
Doing readahead tests with cache connected:
- 3400 ms average
Disconnecting cache:
- 5200 ms average
Creating a new cache:
- 2000 ms average
That's a huge difference.
A fresh cache only primed with ureadahead sees its performance go up by
70%?
Maybe more sequential data ended up in the cache.
Who knows.
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