Thursday, June 18th, 2015, 00:36 UTC | ||
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[00:57:03] | Roklobsta: | dekarl: how often should the defrag be done? |
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[06:23:10] | dekarl: | Roklobsta: well, "when its needed". e.g. once your database has a relevant size with regard to the mysql settings, then when you are cleaning out lots of recordings, or doing a lot of lossless transcodes. Anything that creates holes in the recordedseek table that are scattered all over the table. |
[06:23:42] | dekarl: | After some rounds of deleting then adding differently sized seek tables the time for fetching the data will hit a point where starts to add significantly to the loading time of the seek table. At or shortly before that point would be the time to defragment the table again. Preferrably while no recordings go on |
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[06:25:38] | dekarl: | The latter is why it ended up in the auxillary script that trashes the database already. Now it runs a bit longer, but adding a regular automatic database trashing, that does little for some users, would have led to some nasty surprises. |
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[07:59:59] | stuarta: | morning all |
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[08:05:00] | Roklobsta: | dekarl, well it is a 6+ yo seek table, albeit with some mysql backups and restores along the way, i dont know how that goes for defragmenting things as a side effect. |
[08:14:09] | stuarta: | backup and restore will effectively defrag it |
[08:14:55] | stuarta: | since it completely drops the table and re-inserts it all |
[08:15:23] | stuarta: | if you have ever had to resize the innodb log buffers on an older mysql, that is what you had to do |
[08:16:34] | stuarta: | s/buffers/files/ |
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[08:42:34] | Roklobsta: | stuarta: that'd explain why when i rebuilt my mythbox 8 months ago playback start was fast but it's degraded quickly |
[08:42:39] | stuarta: | firewalld you pile of crap, why are you playing around wwith localhost connections |
[08:43:13] | stuarta: | Roklobsta: interesting. for some reason, i've never seen / noticed any speed degredation |
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[09:52:31] | dekarl: | stuarta, do you have recording rules setup in such a way that recordings are constantly made / removed? I let MythTV take care of removing old recordings to make room for new ones on an as needed basis |
[09:57:11] | stuarta: | i don't use a lot of rules which limit recordings but then expire the old ones |
[09:57:29] | stuarta: | i tend to record and delete after watching, but do also do quite a bit of transcoding |
[09:57:52] | Roklobsta: | why bother transcoding? TB's of drives are cheap now. i stopped doing that ages ago |
[09:58:16] | stuarta: | Roklobsta: lossless to remove ads |
[09:59:53] | Roklobsta: | we used to transcode and have auto ad detection turned on but since big drives got cheap it's simpler to just quickly skip ads when watching and delete once watched. |
[10:00:57] | stuarta: | that's what i do for the stuff i delete |
[10:01:23] | stuarta: | it's the 1000's of kids programs that they like to watch over and over again, which i get 50–70% space saving on a lossless transcode |
[10:01:31] | Roklobsta: | oh ok |
[10:01:48] | Roklobsta: | how much kids stuff is on FTA DVBT in the UK? |
[10:02:00] | stuarta: | lots |
[10:02:39] | stuarta: | there are several channels dedicated, and several others running a good morning lineup |
[10:03:09] | stuarta: | and i do have over 1000 kids programs recorded >8–0 |
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[10:17:23] | Roklobsta: | kids.... |
[10:24:23] | stuarta: | hours of entertainment |
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[14:44:34] | gigem: | paul-h: Documentation? What's that? Seriously, Since Robert Kulagowski (and also Bruce Markey) quit maintaining the HowTO, that's something that has severely lacked. Worse is that we've slowly drifted from away from that documentation and some (a lot?) is flat wrong now. I believe the wiki was supposed to fill the void, but it's only as good as what we and users put into it. |
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[17:31:19] | dekarl: | stuarta, on *buntu 12.04+ with standard mythbuntu packaging of fixes/0.27 the user should have debugging symbols installed automatically, unless the user manually decides against them |
[17:31:51] | dekarl: | so problem report about a running mythbackend.real should contain nice backtraces with symbols by default |
[17:32:13] | dekarl: | if that is not the case, then my first guess is that I messed up the packaging file :/ |
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[17:33:40] | dekarl: | https://github.com/MythTV/packaging/commit/16 . . . 3808ee750dd7 |
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[17:47:06] | dekarl: | hmm, maybe that should be "recommends" instead of only "suggests". tgm4883. "suggests" defaults to *do not install* and "recommends" defaults to *do install*?From the packaging guide its not so clear :/ |
[17:47:43] | tgm4883: | yes recommends installs by default |
[17:47:46] | tgm4883: | suggests does not |
[17:48:14] | tgm4883: | unless the user installs with --no-recommends |
[18:01:34] | dekarl: | should we recommend debugging symbols then? |
[18:09:37] | dekarl: | oh my, that's what superm1 told me to be the right thing back in 2013. why on earth did I do something else :/ |
[18:12:11] | dekarl: | hmm https://github.com/MythTV/packaging/commit/ac . . . 4e038fbe04f0 |
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[18:13:29] | tgm4883: | dekarl: yea I thought we were already doing that by default |
[18:14:05] | dekarl: | its been fixed shortly after my messup |
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