[mythtv-users] Mythfilldatabase taking FOREVER

Peter Bennett pb.mythtv at gmail.com
Tue Jun 14 16:27:36 UTC 2022

On 6/4/22 22:50, Stephen Worthington wrote:
> On Sat, 4 Jun 2022 21:33:09 -0400, you wrote:
>> Recently, I'm noticing that mythfilldtabase is taking something like 12
>> hours to finish. I know we had some issues with SD and the backend
>> maintenance, so not sure if that has been fully resolved.
>> I'm on Ubuntu 18.04 and mythtv v30.0.  I use the sdjson_sqlite grabber
>> v1.109 and xmltv v0.5.70.  I only have about 100 channels set as "selected"
>> in the sqlite database.
>> Mythfilldatabase sits forever on the message "pruning local database"
>> I see very low CPU utilization on a four vCPU i7 VM with 8GB RAM.
>> Any thoughts on why this is taking so long?
>> Larry

Does the disk thrash during the run? I found that mythfilldatabase took 
a long time and there was considerable disk thrashing. My solution was 
to add nobarrier in the fstab for the fie system that stores the mysql 

UUID=f8877741-668e-462b-8315-613a44fc5698 /               ext4 
nobarrier,errors=remount-ro  0       1

If you have an SSD this is likely not applicable. In my case with a hard 
drive this was a huge improvement.


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