Infos on connection pooling

Frank Warmerdam warmerdam at POBOX.COM
Fri Mar 17 12:26:21 EST 2006

Daniel Morissette wrote:
> Is there any documentation on the way connection pooling works in 
> MapServer? I did a search on the website and found only two references:
> A section of the OGR HOWTO:
> and a paragraph under the PROCESSING directive in the mapfile/layer docs:
> Is the information in the OGR howto the most complete doc that we have 
> for this feature?


In fact, there is a completely different mechanism used for connection
pooling for the OGR layers currently.  The database data types all use
the mappool.c mechanism.  I likely ought to do the same for OGR.

In any event, I did use the same keyword and it has roughly the same effect
in both cases.

The OGR docs report:

"This use of CLOSE_CONNECTION handling is unique to OGR layers, and may be 
changed at some point in the future as part of a broader implementation of 
connection pooling in MapServer."

This extension has happened and the doc should likely be updated accordingly.

> Also, the LAYER docs says that Oracle connections support pooling. Is 
> this support complete? Are there any known issues with using connection 
> pooling with Oracle layers?

As far as I know this works fine.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at
light and sound - activate the windows |
and watch the world go round - Rush    | President OSGF,

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