[Chameleon] Proxy server getting fed up?

[Jacob Delfos]

Hi All,

I have run into a little problem to which I cannot seem to find a good solution; Whenever I try to access our chameleon sites on our public server, our browser goes through the proxy-server. For some reason, this proxy gets extremely slow after a number of visits have been made. After the proxy server is cleared (all cached documents gone), it's very fast again. But within a few days, it's all clogged up. Unfortunately, one of our clients seems to be experiencing similar problems; their proxy server seems fed up with chameleon pages/images, because access to our server is getting much slower.

I think it is related to how the documents are cached. I am no expert at all, but I suspect it uses a hashing algorithm, which degenerates to a sequential search for URL's that are very similar and would return a similar result from the hashing algorithm. Is that what's going wrong? The problem shows up particularly for UpdateMap.php, after using javascript to nagivate (without submitting the page, in CWC 1.0.4). Each request to this file takes 4 seconds or more (on a LAN), making javascript navigation slower than submitting.

I got tags in my template to supposedly prevent caching:

<META HTTP-EQUIV="Expires" CONTENT="0">
<meta http-equiv="pragma" content="no-cache">

But no effect. I've also tried to put an extra random string as the first parameter for UpdateMap.php (in case it hashes on the first part of the url string), but it didn't have any effect at all.

Has anyone else run into this, or does anyone know more about this? I'd appreciate any tricks anyone can give me.

regards,

Jacob

P.S. sorry about asking questions about the 'older' version, but I haven't got javascript navigation working yet in 1.99.


JACOB DELFOS
SPATIAL INFORMATION ANALYST
Maunsell Australia Pty Ltd
629 Newcastle Street, WA 6007
PO Box 81, WA 6902
Leederville 
Western Australia
ABN 20 093 846 925

Tel     + 61 8 9281 6185
Fax    + 61 8 9281 6297
jacob.delfos at maunsell.com
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