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tuned: Add readahead comment to throughput-performance tuned.conf

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A common source of confusion within tuned is the lack of suffix
on the readahead specification in the throughput-performance
tuned.conf. This confusion is resolved, in general, by comparing
the value, for example, to blockdev or lvdisplay output. Avoid
future end-user confusion by adding a comment to the
throughput-performance tuned.conf file, explaining that the default
is in KiB, and noting the allowance of a sector suffix as well.

Signed-off-by: John Pittman <jpittman@redhat.com>
This commit is contained in:
John Pittman 2018-03-07 15:53:39 -05:00
parent cd52c9ea08
commit 8cccd5a0eb
1 changed files with 3 additions and 0 deletions
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profiles/throughput-performance/tuned.conf
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@ -11,6 +11,9 @@ energy_perf_bias=performance
min_perf_pct=100
[disk]
# The default unit for readahead is KiB. This can be adjusted to sectors
# by specifying the relevant suffix, eg. (readahead => 8192 s). There must
# be at least one space between the number and suffix (if suffix is specified).
readahead=>4096
[sysctl]