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change semantics of disk read time and add disk hash time

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Arvid Norberg
2011-03-14 05:21:46 +00:00
parent ff7bbc6cd0
commit a08bcf7459
5 changed files with 34 additions and 9 deletions
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17
docs/manual.rst
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@@ -853,6 +853,8 @@ Returns status of the disk cache for this session.
int total_used_buffers;
int average_queue_time;
int average_read_time;
int average_write_time;
int average_hash_time;
int job_queue_length;
};
@@ -886,9 +888,18 @@ used in peer connections.
``average_queue_time`` is the number of microseconds an average disk I/O job
has to wait in the job queue before it get processed.
``average_read_time`` is the number of microseconds a read job takes to
wait in the queue and complete, in microseconds. This only includes
cache misses.
``average_read_time`` is the time read jobs takes on average to complete
(not including the time in the queue), in microseconds. This only measures
read cache misses.
``average_write_time`` is the time write jobs takes to complete, on average,
in microseconds. This does not include the time the job sits in the disk job
queue or in the write cache, only blocks that are flushed to disk.
``average_hash_time`` is the time hash jobs takes to complete on average, in
microseconds. Hash jobs include running SHA-1 on the data (which for the most
part is done incrementally) and sometimes reading back parts of the piece. It
also includes checking files without valid resume data.
``job_queue_length`` is the number of jobs in the job queue.