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Re: 5.1 to 5.5 upgrade causes significant write slowdown (MyISAM + indexes)
Posted by: Ben Wallach
Date: January 26, 2013 03:36PM

Thanks Scott/Rick.

yes, we are using RAID-1 on old and new setup.
One other observation is that during the heavy writes we observe the following via the iotop utility:
I/O
----------------------------
old hardware:
root ~12.00% [jbd2/sda4-8]

new hardware
root 99.99% [jbd2/sda4-8]

My understanding is this root process has to do with the Linux filesystem journaling. I dont know enough about this though.

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Re: 5.1 to 5.5 upgrade causes significant write slowdown (MyISAM + indexes)
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January 26, 2013 03:36PM


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