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Re: Diagnosing what applications are doing




On Sunday 26 May 2019 07:05:45 am Jonas Smedegaard wrote:

> Quoting Paul Sutton (2019-05-26 12:28:43)
>
> > On my netbook,  Thunderbird seems really unstable, it stars up fine
> > then seems to stall and fails to respond,  it eventually picks up. 
> > I usually goto a terminal and type killall thunderbird.
> >
> > I can usually also minimise thunderbird, but maximising it, ends up
> > with the top of the application bar only and the rest of the
> > application is not maximised properly.
> >
> > Is there a program that I can run to try and figure out what it is
> > doing ?  I am sure there is but not sure what I would be looking for
> > even with searching.
> >
> > In a similar way to using time,  which tells how long a program has
> > run for,  I guess I need some sort of memory or cpu trace to see
> > what Thunderbird is doing to behave this way.
> >
> > Chances are it will be rather incomprehensible, but at least it
> > could be something I can post here, ( well pastebin if huge output )
> > so others can take a look.
> >
> > In the meantime I have removed my usenet account from the netbook,
> > as i don't use it,  on the netbook enough to justify having.
>
> To monitor in real time what steal most ressources, install and run
> atop. Hit C/M/D/N to sort by cpu/memory/disk/net, or A to auto-sort.
>
> To monitor both in real time and collect data in the background to
> later analysis (e.g. to examine past minutes _after_ Thunderbird has
> crashed), install pcp and run "pcp atop" for real time view
>
> To inspect what happens with Thunderbird itself, I guess you should
> look in the menus of the application for ways to open a log window...
>
One thing that will "freeze" it is using its own download facilities to 
fetch the mail, used to bug me pretty badly, but when it did come back, 
everything I had typed into a message came back with it.  So I offloaded 
that fetching of emails by making fetchmail, procmail, clamscan and 
spamassassin  all into background tasks that have minimal effect on 
kmail.  Now my freezes are maybe a second as it sorts an incoming email 
that has servived the spam and viri filters.

I can elaborate if there is interest,
>
>  - Jonas


Cheers, Gene Heskett
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