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<body>On Fri, 05 Oct 2012 23:20:41 +1300, Steve Hodge <stevehodge@gmail.com> wrote:<br><br><blockquote style="margin: 0 0 0.80ex; border-left: #0000FF 2px solid; padding-left: 1ex"><div class="gmail_quote">On Fri, Oct 5, 2012 at 9:52 PM, Stephen Worthington <span dir="ltr"><<a href="mailto:stephen_agent@jsw.gen.nz" target="_blank">stephen_agent@jsw.gen.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">
</div>Yes, that was the problem. Ext filesystems have a horrible delete<br>
process that practically locks up the drive until it completes. It is<br>
only usually a problem with larger files, but that includes almost all<br>
video/recording files. It also happens when a large log file is<br>
deleted, which happens from cron jobs. There is no workaround - you<br>
have to use a different filesystem. <br></blockquote><div><br>There is a workaround and the slow deletes option is it. Instead of deleting a recording in a single operation it progressively
truncates the recording to smaller and smaller sizes before finally
deleting it. This avoids the issue as fewer file blocks are unlinked in
each operation.<br> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">If there are multiple deletions<br>
coming from MythTV, there is an option somewhere for "slow deletes" or<br>
something like that, which I think prevents back-to-back deletes from<br>
making the problem even worse.</blockquote><br>No, it's got nothing to do with multiple deletes.<br><br>Deletes don't seem to be the problem here though.<br><br>Cheers,<br>Steve<br></div>
</blockquote><br><br><br><div id="M2Signature"><div>I have slow deletes enabled and it has not helped in my case.</div><div>Here is the log covering the period when "Supernatural" was being recorded.At around 22:55:00 till 24:25:00 the recording exihibits the pixellation.</div><div><br></div><div>---------------------------------------</div><div><br></div><div>Oct 5 22:30:00 myth mythbackend[1556]: I Scheduler scheduler.cpp:2513 (HandleRecordingStatusChange) Tuning recording: Supernatural: channel 1002 on cardid 4, sourceid 1<br>Oct 5 22:30:00 myth mythbackend[1556]: I CoreContext scheduler.cpp:637 (UpdateRecStatus) Updating status for Supernatural on cardid 4 (Tuning => Recording)<br>Oct 5 22:30:01 myth mythbackend[1556]: I TVRecEvent tv_rec.cpp:3989 (TuningNewRecorder) TVRec(4): rec->GetPathname(): '/var/lib/mythtv/recordings/1002_20121005223000.mpg'<br>Oct 5 22:30:11 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:30:23 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:31:16 myth mythbackend[1942]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 22:31:16 myth mythbackend[1942]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 22:32:11 myth mythbackend[1852]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 22:32:11 myth mythbackend[1852]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 22:35:00 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:35:17 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:35:28 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:40:03 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:40:20 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:40:30 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:42:59 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min<br>Oct 5 22:43:48 myth mythbackend[1556]: I ProcessRequest mainserver.cpp:1360 (HandleAnnounce) MainServer::ANN Monitor<br>Oct 5 22:43:48 myth mythbackend[1556]: I ProcessRequest mainserver.cpp:1362 (HandleAnnounce) adding: myth as a client (events: 0)<br>Oct 5 22:43:48 myth mythbackend[1556]: I ProcessRequest mainserver.cpp:1360 (HandleAnnounce) MainServer::ANN Monitor<br>Oct 5 22:43:48 myth mythbackend[1556]: I ProcessRequest mainserver.cpp:1362 (HandleAnnounce) adding: myth as a client (events: 1)<br>Oct 5 22:45:03 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:45:22 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:45:33 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:46:16 myth mythbackend[1942]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 22:46:16 myth mythbackend[1942]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 22:47:11 myth mythbackend[1852]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 22:47:11 myth mythbackend[1852]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 22:50:04 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:50:24 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:50:39 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:50:58 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min<br>Oct 5 22:55:04 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:55:28 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:55:44 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 22:57:59 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min<br>Oct 5 23:00:10 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:00:32 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:00:51 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:02:11 myth mythbackend[1852]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 23:02:11 myth mythbackend[1852]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 23:02:16 myth mythbackend[1942]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 23:02:16 myth mythbackend[1942]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 23:04:59 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min<br>Oct 5 23:05:17 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:05:34 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:05:57 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:10:20 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:10:41 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:10:59 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:11:58 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min<br>Oct 5 23:15:21 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:15:43 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:16:04 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:17:16 myth mythbackend[1942]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 23:17:16 myth mythbackend[1942]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 23:18:11 myth mythbackend[1852]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 23:18:11 myth mythbackend[1852]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 23:19:59 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min<br>Oct 5 23:20:23 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:20:45 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:21:10 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:25:27 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:25:47 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:26:10 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:26:59 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min<br>Oct 5 23:30:33 myth mythbackend[1556]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:30:52 myth mythbackend[1942]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:31:17 myth mythbackend[1852]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread<br>Oct 5 23:32:11 myth mythbackend[1942]: I Metadata_2318 jobqueue.cpp:2151 (DoMetadataLookupThread) JobQueue: Metadata Lookup Starting for Supernatural recorded from channel 1002 at 2012-10-05T22:30:00</div><div><br></div><div><br></div><div>----------------------------------------</div><div><br></div><div>While I'm about it I might ask if the regular:</div><div><br></div><div>Oct 5 23:17:16 myth mythbackend[1942]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 23:17:16 myth mythbackend[1942]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 23:18:11 myth mythbackend[1852]: E Expire autoexpire.cpp:161 (CalcParams) AutoExpire: Filesystem Info cache is empty, unable to calculate necessary parameters.<br>Oct 5 23:18:11 myth mythbackend[1852]: E Expire autoexpire.cpp:421 (ExpireRecordings) AutoExpire: Filesystem Info cache is empty, unable to determine what Recordings to expire<br>Oct 5 23:19:59 myth mythbackend[1556]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 7 min</div><div><br></div><div>Entries are an indication of any problems in my set-up?They seem to occur more frequently than the pixellation problem,though.</div><div><br></div><div>Cheers</div><div><br></div><div>Paul</div><div><br></div><div><br></div></div></body></html>