[mythtv-commits] Ticket #12411: threadedfilewriter - 'Maximum buffer size exceeded' & 'Taking to long to flush..'

[MythTV]

#12411: threadedfilewriter - 'Maximum buffer size exceeded' & 'Taking to long to
flush..'
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 Reporter:  thekingofspain@…            |          Owner:  jyavenard
     Type:  Bug Report - Hang/Deadlock  |         Status:  closed
 Priority:  minor                       |      Milestone:  unknown
Component:  MythTV - Recording          |        Version:  0.27.4
 Severity:  medium                      |     Resolution:  Invalid
 Keywords:                              |  Ticket locked:  0
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Comment (by thekingofspain@…):

 Still getting lockups at certain times, so nothing is popping out from the
 logs or stats.  Switched the scheduler to deadline since it benchmarked
 the fastest of the three schedulers on the machine.  Drives are SATA 7200
 RPM.

 Runnning a test now, watching a recording, and recording 3 shows:

 iostat -x 1

 vg-cpu:  %user   %nice %system %iowait  %steal   %idle
            1.77    5.30    1.52    2.53    0.00   88.89

 Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz
 avgqu-sz   await r_await w_await  svctm  %util
 sda               0.00     0.00    0.00    0.00     0.00     0.00     0.00
 0.00    0.00    0.00    0.00   0.00   0.00
 sdb               0.00     0.00    0.00   11.00     0.00  2386.00   433.82
 0.16   14.55    0.00   14.55  13.64  15.00
 sdc               0.00     0.00    2.00   11.00   512.00  2386.00   445.85
 0.47   36.46   32.00   37.27  15.85  20.60
 scd0              0.00     0.00    0.00    0.00     0.00     0.00     0.00
 0.00    0.00    0.00    0.00   0.00   0.00
 md0               0.00     0.00    2.00    9.00   512.00  2384.00   526.55
 0.00    0.00    0.00    0.00   0.00   0.00

 That was the highest utilization that was reported.

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Ticket URL: <https://code.mythtv.org/trac/ticket/12411#comment:5>
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