[ka-Map-users] Tuning Apache and PHP on Windows 2000?

[Jeff Dege]

I've been watching things in Performance Monitor, and we're not paging,
and we're not coming close to the limits of available CPU, memory, or
disk throughput.

Which is why I was wondering if we might be bouncing up against
configurable limits in Apache or PHP.

The delay seems to be in generating tiles.  If I clear the browser's
buffer, the tiles show up quite snappily.

> -----Original Message-----
> From: Stephen Woodbridge [mailto:woodbri at swoodbridge.com] 
> Sent: Tuesday, October 03, 2006 6:14 PM
> To: Jeff Dege
> Cc: ka-map-users at lists.maptools.org
> Subject: Re: [ka-Map-users] Tuning Apache and PHP on Windows 2000?
> 
> Jeff Dege wrote:
> > We're running KA-Map on Windows 2000.  And it's working 
> fine, except for
> > performance.
> > 
> > Tile generation is taking way too long.  30-40 seconds, sometimes.
> > 
> > I don't think we can do much more with the mapfile - Mapserver draws
> > maps much more quickly.
> > 
> > I was wondering if there were any configuration options in 
> Apache or PHP
> > that might be bottlenecking things.
> > 
> > Anyone have any ideas?
> 
> Well, you need to remember that ka-map draws a meta tile which is 
> typically 5x5 regular tiles so it need 25 times the image memory 
> required to draw a single tile. This may cause your system to page to 
> disk which would REALLY slow things down.
> 
> You can try making your meta tiles smaller, or add more memory. Other 
> than the larger memory requirements and the effort to chop 
> and store the 
> individual tile, it is just mapserver running.
> 
> You cant to make sure you do NOT have the force option 
> configured ot it 
> will regenerate the tiles on EVERY request which is not what you want.
> 
> Are things fast, if you pan across an area that you have 
> already panned 
> over in the past, ie are you pulling cached tiles or are you 
> generating 
> the tile again?
> 
> -Steve W.
>