Retire ra file handle #316
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As it adds fixed overhead to each disk IO operation and duplicates information that is better accessed by the operation system. To compensate this adds a "bytes written" counter to the wal and segment writer processes respectively. This will allow of inspection of Ra component specific IO use to some degree. Add snapshot_bytes_written counter unrelated test reliability Add ra log gauge for number of opened segments.
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As it adds fixed overhead to each disk IO operation and duplicates
information that is better accessed by the operation system.
To compensate this adds a "bytes written" counter to the wal and
segment writer processes respectively. This will allow of inspection
of Ra component specific IO use to some degree.