[mythtv-users] A few 0.19 and RAM questions
rtsai1111 at comcast.net
Sun Feb 5 17:09:46 UTC 2006
On Sat, Feb 04, 2006 at 08:23:08PM -0800, Yeechang Lee wrote:
> Like all other 0.18.1 users on the list I am eagerly looking forward
> to 0.19 (specifically, the ATrpms version). A few questions in
I've been running CVS/SVN for quite some time (Feb 2005, don't know
what release that translates to):
> a) Is the (takes a deep breath) "Certain recordings on playback
> consistently crash mythfrontend immediately and/or prevent the
> OSD from appearing and/or crash the frontend when the OSD appears
> for any reason, although the recordings play back fine in mplayer
> and in the preview window" issue definitely fixed in 0.19? I
> seem to recall reading as much, but am not sure.
I haven't experienced this issue ever, so I probably can't provide a
> b) Based on some hints I've read here and elsewhere I get the
> impression that many or all of the root architectural causes that
> result in IOBOUND error messages when recording HDTV (especially
> more than one at a time, or when there is other disk activity
> going on, including deletes and commflagging) are solved in 0.19.
I've never experienced IOBOUND errors, either. This is despite:
- Two HD3000 cards often simultaneously recording OTA HDTV to
a pair of SATA drives (JFS on LVM),
- Sometimes concurrently watching a recording (combined FE/BE
- Sometimes, for good measure, also building a new kernel or
mythtv SVN update.
I don't religiously watch my logfiles, but I haven't experienced any
> c) What does MythTV use additional RAM for, if anything? I have 512MB
> on my frontend/backend that is solely dedicated to MythTV.
> Despite my best efforts at cutting back on extraneous
> applications and daemons, including switching from full-blown KDE
> to ratpoison and from xterm to rxvt, the system consistently uses
> 150-300MB of swap according to 'free -m'. If I were to upgrade to
> 2GB of RAM, would mythbackend automatically use the extra RAM to,
> say, buffer recordings so as to minimize the IOBOUND errors I
> mention in b)? Or would upgrading to 1GB, thus theoretically
> eliminating the need for any swap, be sufficient?
I can't answer your question. I have 1GB RAM and have never seen my
swap space utilization go over 1MB at most, so maybe 1GB RAM would be
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