[OT] select and sysread problem on solaris

[Mark Overmeer]

* Paul Johnson (paul at pjcj.net) [080911 09:20]:
> On Thu, Sep 11, 2008 at 02:36:55AM +0100, Andy Armstrong wrote:
> >     printf( "%d\n", FD_SETSIZE );
> 
> The output is 1024, but I'm not convinced the problem lies in this area.

See http://blogs.sun.com/elving/entry/too_many_open_files
Do you have perl compiled as 32bit or 64bit?  It wouldn't wonder
me if Solaris lied to Perl about the max number of file-descriptors.

> We have just moved from under 128 files per select to just over, but I
> don't think this is the problem.  Additionally, the system will seem to
> work fine for many Gb of data before this problem is (seemingly
> randonly) triggered.

Clients address your service via sockets which count as file-descriptors
as well.  It is not only a limit on what you can pass with select():
the whole sum of pipes and sockets over all threads within one process
can not exceed 256.  (At least, that is my interpretation of the docs)
-- 
Regards,
               MarkOv

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       Mark Overmeer MSc                                MARKOV Solutions
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