RE: [Webware-discuss] performance problem?

[Geoffrey T. <gta...@na...>]

No, what I did was add a flag ClearPSPCacheOnStart which defaults to 1, but
if you set it to 0, then it doesn't clear out the PSP cache when you start
the app server.

- Geoff

> -----Original Message-----
> From: Love, Jay [mailto:Jay...@me...]
> Sent: Monday, June 24, 2002 1:15 PM
> To: Geoffrey Talvola; 'Lars Rustemeier';
> web...@li...
> Subject: RE: [Webware-discuss] performance problem?
> 
> 
> Geoff, didn't you add a debugging mode that always recompiles the PSP?
> Could that be on?
> 
> Jay
> 
> > -----Original Message-----
> > From: Geoffrey Talvola [mailto:gta...@na...]
> > Sent: Monday, June 24, 2002 12:50 PM
> > To: 'Lars Rustemeier'; web...@li...
> > Subject: RE: [Webware-discuss] performance problem?
> > 
> > 
> > Lars Rustemeier wrote:
> > > 
> > > hi guys,
> > > 
> > > this afternoon we've been stress testing our webkit-powered 
> > servers by
> > > making lots of requests for a single .psp-page, containing a
> > > simple threadsafe singleton counter counting up the number of 
> > > times the
> > > page been rendered. some of the times the server 
> registred an error
> > > giving the following traceback. 
> > > 
> > > Traceback (most recent call last):
> > >   File "./WebKit/Application.py", line 388, in dispatchRequest
> > >   File "./WebKit/Application.py", line 534, in handleGoodURL
> > >   File "./WebKit/Application.py", line 989, in
> > > createServletInTransaction
> > >   File "./WebKit/Application.py", line 916, in getServlet
> > >   File "./PSP/PSPServletFactory.py", line 177, in 
> > > servletForTransaction
> > >   File "./PSP/PSPCompiler.py", line 60, in compile
> > >   File "./PSP/ServletWriter.py", line 79, in close
> > > OSError: [Errno 2] No such file or directory:
> > > '/home/webkit/nbwsite/Cache/PSP/_home_webkit_nbwsite_NBWContex
> > > t_fun_index_psp.py'
> > > 
> > > does anybody know the cause of this exception. it seems 
> the code in
> > > ServletWriter(79) simply tries to remove a file, and the file is
> > > reported by the os module to not exist.
> > > 
> > > without really digging deep into this; it seems the servlet 
> > factory is
> > > out of cached instances of the compiled psp-page and tries 
> > to create a
> > > new one. i tried to put a try-catch around the offending line in
> > > ServletWriter without really knowing if that has any bad 
> > side effects,
> > > and the problem seemed to go away.
> > > 
> > > was i barking up the wrong tree?
> > > 
> > > best regards
> > > 
> > > /largo
> > 
> > I just glanced at the PSP code (from CVS) and it looks like 
> it should
> > _never_ have to recompile the PSP page once it has been 
> > compiled, unless you
> > restart the appserver or the modification time of the PSP 
> > file changes.
> > 
> > Are you seeing these errors when the app server first starts 
> > or later on?
> > Are you modifying the PSP file while the appserver is running?
> > 
> > - Geoff
> > 
> > 
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