[mythtv] Why are there so many instances of recordedseek?

Alan Young ayoung at teleport.com
Wed Apr 22 06:22:24 UTC 2015

dennis wrote:
> Before changing the key_buffer_size you might want to check your 
> existing cache hit rate.   I have several hundred recordings and even 
> with the key_buffer_size at the default 16MB,  I am getting well over 
> 99% cache hit rate.

I agree. You definitely want to take a baseline measurement and record 
the existing settings before fiddling with the knobs and the blinking 
lights. Another thing to look at is the statistics and  buffer usage 
after a couple of _days_. When I reran a report this morning after 3 1/2 
days of uptime, it was only using 33.87MB of the 200 I had specified for 
it. If I were to be using a system with far less than the 8GB I have 
now, I may want to look at adjusting the settings downward to what it 
actually being used.  And I admit, I bumped that particular value up 
that high over three years ago when I was getting stuttering, slow 
queries and other "oddness". The system has been through upgrades since 
then. And while it doesn't have the the DB on a SSD, it is probably a 
prudent exercise to go back to the defaults and review system behavior. 
WAF providing, of course.

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