<!--
Copyright 2020 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<!--
This file is used to generate a comprehensive list of Disk histograms
along with a detailed description for each histogram.
For best practices on writing histogram descriptions, see
https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md
Please follow the instructions in the OWNERS file in this directory to find a
reviewer. If no OWNERS file exists, please consider signing up at
go/reviewing-metrics (Googlers only), as all subdirectories are expected to
have an OWNERS file. As a last resort you can send the CL to
[email protected].
-->
<histogram-configuration>
<histograms>
<histogram name="DiskCache.0.Error" enum="DiskCacheError"
expires_after="2025-01-05">
<owner>[email protected]</owner>
<owner>src/net/disk_cache/OWNERS</owner>
<summary>
Critical error ids. Reported each time the disk backed blockfile cache
encounters an error or a critical error. Warning: this histogram was expired
from Oct 2020 to Sep 2021; data may be missing.
</summary>
</histogram>
<histogram name="DiskCache.0.TotalIOTimeRead" units="ms"
expires_after="2025-02-16">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The total time it takes to perform a read IO operation. This is emitted at
each cache read, and measures from the IO thread to background thread,
waiting for the disk read, and back to the IO thread.
</summary>
</histogram>
<histogram name="DiskCache.0.TotalIOTimeWrite" units="ms"
expires_after="2025-02-16">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The total time it takes to perform a write IO operation. This is emitted at
each cache read, and measures from the IO thread to background thread,
optionally waiting for the disk write, and back to the IO thread.
</summary>
</histogram>
</histograms>
</histogram-configuration>
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