naviserver-devel

[naviserver-devel] Stats question

[Bernd E. <eid...@we...>]

Hi there,

i activated the statistics on one server and on the 
Main Menu > Threads
page I see, amongst others, a huge list of threads with the NS_THREAD_DETACHED 
flag and no PROC, no ARG, with ones having creation times going back more 
than 10 hours.

Something to worry?

Bernd.

Re: [naviserver-devel] Stats question

[Vlad S. <vl...@cr...>]

Than could be idle conn threads

Bernd Eidenschink wrote:
> Hi there,
> 
> i activated the statistics on one server and on the 
> Main Menu > Threads
> page I see, amongst others, a huge list of threads with the NS_THREAD_DETACHED 
> flag and no PROC, no ARG, with ones having creation times going back more 
> than 10 hours.
> 
> Something to worry?
> 
> Bernd.
> 
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Re: [naviserver-devel] Stats question

[Stephen D. <sd...@gm...>]

On 9/26/07, Bernd Eidenschink <eid...@we...> wrote:
>
> Hi there,
>
> i activated the statistics on one server and on the
> Main Menu > Threads
> page I see, amongst others, a huge list of threads with the NS_THREAD_DETACHED
> flag and no PROC, no ARG, with ones having creation times going back more
> than 10 hours.
>
> Something to worry?


What is the name of the threads (the first column) ?

Re: [naviserver-devel] Stats question

[Bernd E. <eid...@we...>]

> > i activated the statistics on one server and on the
> > Main Menu > Threads
> > page I see, amongst others, a huge list of threads with the
> > NS_THREAD_DETACHED flag and no PROC, no ARG, with ones having creation
> > times going back more than 10 hours.
> >
> > Something to worry?
>
> What is the name of the threads (the first column) ?

The "Thread" column is empty...
And:
"Proc:" p:(nil)
"Arg:" a:(nil)
(By "huge list" i mean: about 150+)

The other usual suspects names are:
writer, sched, main, driver, conn:server1:nnnn

Bernd.

Re: [naviserver-devel] Stats question

[Stephen D. <sd...@gm...>]

On 9/27/07, Bernd Eidenschink <eid...@we...> wrote:
> > > i activated the statistics on one server and on the
> > > Main Menu > Threads
> > > page I see, amongst others, a huge list of threads with the
> > > NS_THREAD_DETACHED flag and no PROC, no ARG, with ones having creation
> > > times going back more than 10 hours.
> > >
> > > Something to worry?
> >
> > What is the name of the threads (the first column) ?
>
> The "Thread" column is empty...
> And:
> "Proc:" p:(nil)
> "Arg:" a:(nil)
> (By "huge list" i mean: about 150+)
>
> The other usual suspects names are:
> writer, sched, main, driver, conn:server1:nnnn


If you do a:

  ps axf

does the process actually have > 150 threads? I'm wondering if this is
a problem with thread cleanup or with reporting.

Re: [naviserver-devel] Stats question

[Bernd E. <eid...@we...>]

> If you do a:
>
>   ps axf
>
> does the process actually have > 150 threads? I'm wondering if this is
> a problem with thread cleanup or with reporting.

I have to do a 
"ps axH"

"H" is "Show threads as if they were processes".

Then I currently count 23, which is about the maxthreads (15) number plus some 
writer etc. threads.

Re: [naviserver-devel] Stats question

[Stephen D. <sd...@gm...>]

On 9/27/07, Bernd Eidenschink <eid...@we...> wrote:
>
> > If you do a:
> >
> >   ps axf
> >
> > does the process actually have > 150 threads? I'm wondering if this is
> > a problem with thread cleanup or with reporting.
>
> I have to do a
> "ps axH"
>
> "H" is "Show threads as if they were processes".
>
> Then I currently count 23, which is about the maxthreads (15) number plus some
> writer etc. threads.
>


Good. No stray threads.

But the output of [ns_info threads] is wrong...

Do you have any unusual modules loaded, especially any that might
create threads? What does the 'parent' column say?

You could also look back in your error log and match up the threadid
in any log output with the threadid column in the stats output, which
might give a clue as to what these threads were.

It looks to me like a thread without a name must have been create by
an external library that didn't use Ns_ThreadCreate (which sets a
generic name by default), but did call some ns library function which
ended up calling Ns_ThreadGetName (e.g. Ns_Log), and that would cause
the foreign thread to be added to the global list of threads visible
to ns_info threads.

Re: [naviserver-devel] Stats question

[Bernd E. <eid...@we...>]

> Do you have any unusual modules loaded, especially any that might
> create threads? What does the 'parent' column say?

we have only nsdbpg;
and xotcl-1.5.4, tDOM-0.8.2.

> You could also look back in your error log and match up the threadid
> in any log output with the threadid column in the stats output, which
> might give a clue as to what these threads were.

ok, i'll take a look.

Bernd.