[Zope] Multiple threads using Apache Rewrite

[jim at jaydublu.com]

Thanks to PieterB for this url:



Following the procedure at
http://www.zettai.net/Members/george/python213FreeBSDPlone.blog/view
seems to have improved the situation. Time will tell



I couldn't find the patched thread_pthread.h at plone.org so skipped
that step.



Jim.



On 01-08-2004 02:08 pm, you wrote:



> On Thu, 2004-01-08 at 13:59, jim at jaydublu.com wrote:

> 

> > Running ps -aux only ever shows two Zope processes, no matter how
hard

> > one is working. Isn't there supposed to be a monitor process
running

> > which forks new processes when existing ones get busy, like Apache

> > does?

> 

> Jim,

>   No the monitor process does not spawn additional processes/threads,
it

> just makes sure that Zope is still running.  Zope internally uses
python

> threads (mixed with an event loop in asyncore.py) to handle
requests.

> 

> We also run FreeBSD and have noticed some threading issues recently. 
I

> did a study about a year ago into Solaris threading issues an Zope
and

> was comparing it to FreeBSD.  At the time the threading was
definately

> working on FreeBSD.  Since then though we have upgraded Zope (2.3.x
->

> 2.6.2), python (1.5.2 -> 2.1.3), and FreeBSD (4.x to 4.9-STABLE) and

> added ZEO and DirectoryStorage into the mix, so I don't know when
and

> what has broken it! :(

> 

> I have tried replicating the setup, but with python 2.3.3 and Zope
2.7.x

> and at first experienced the same problems, but on a second try they

> seemed to go away.  The main symptom was if you did a long running
I/O

> intensive task (reads, not writes) such as doing a Zope Find on a
large

> ZODB then all other threads would hang.

> 

> In the end I have worked around it by recompiling python 2.1.3 with

> LinuxThreads support (look at the README in the LinuxThreads port)
and

> it has been running fine now for a few months.

> 

> -Matt

> 

> -- 

> Matt Hamilton                                        
matth at netsight.co.uk

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> 

>