Journaling is killing response time

[bmarsh at bmarsh.com]

By using "iotop" and seeing JBD2 doing the i/o.  Try. Iotop  -oPa




> On Mar 8, 2015, at 5:36 AM, Nils Kassube <kassube at gmx.net> wrote:
> 
> Bruce Marshall wrote:
>> Lately I've been having really bad response intermittently, but often
>> enough it is really irritating.  For example, I will try to kill a
>> program like T-bird, and it will take so long that I get the "not
>> responding" message. But the problem is that it CAN'T respond due to
>> being blocked by the journaling I/O.  If I tell it to wait, it will
>> finally close.
> 
> I'm curious: How do you know it is journaling I/O? I mean, I have also 
> seen similar response problems but here it happens for several months 
> now and I'd really like to know the cause. I'm using 14.04 BTW.
> 
> 
> Nils
> 
> 
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