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authorHeikki Kallasjoki <fis@zem.fi>2018-11-30 22:28:10 +0000
committerHeikki Kallasjoki <fis@zem.fi>2018-11-30 22:28:10 +0000
commit11766041777085ef2746aedda66bf9483a7f1892 (patch)
tree848a4b20ef2bd0a30226dff4d34dce82a63a0ef2 /README.md
parent202a4f83a9449a0d36b9475435233e5773d490aa (diff)
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Filter out unused devices from diskstats.
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1 files changed, 4 insertions, 1 deletions
diff --git a/README.md b/README.md
index e6c580a..abb2cc0 100644
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+++ b/README.md
@@ -134,7 +134,7 @@ The metrics correspond to the columns of `/proc/diskstats`:
 
 See the kernel's
 [Documentation/iostats.txt](https://www.kernel.org/doc/Documentation/iostats.txt)
-for more details. The collector assumes the read/write totals are
+file for more details. The collector assumes the read/write totals are
 reported using a sector size of 512 bytes.
 
 All metrics have one label, `device`, containing the device name from
@@ -149,6 +149,9 @@ not mentioned on the exclude list are included. If the given value
 ends in `*`, it matches any string that begins with the part before
 the `*`; otherwise, the match must be exact.
 
+By default, if the device is entirely unused (all metrics are 0), it's
+omitted. Use `--diskstats-keep-unused` to include even those devices.
+
 ### `filesystem`
 
 Metrics: