[Zope] How can i improve performance of website under heavy load in Zope2.6.1

[Stefan H. Holek]

On 31. Jul 2006, at 09:13, Sudesh Soni wrote:

> I wonder why Zope is default set for handling 4 threads and 7  
> database connections.

These are good values under normal circumstances.

>
> I tried inreasing threads to 20 and database connections to 30 by  
> updating z2.py and DB.py, presuming that this will help to improve  
> performance under heavy load.
>
> Can anyone suggest what impact will be there if i do this , in Zope  
> 2.6.1
>

Zope is not Apache. Increasing the number of threads is unlikely to  
help performance unless, perhaps, when you have a heavily loaded  
RDBMS backing your Zope and see threads "hanging" waiting for the  
RDBMS to respond.

> OR
>
> Can anyone suggest any other option to improve performance under  
> heavy load in Zope 2.6.1

Figure out why your Zope is slow. Is it CPU bound or I/O bound? Use a  
profiler to analyze your code (PTProfiler, ZopeProfiler). Set up ZEO  
+ multiple ZEO clients, if need be on multiple boxes. And put a cache  
in front, Squid works well.

Stefan

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