Internet Explorer Support of Vary Header
When Internet Explorer 7 is sent a ‘vary’ http header, it is unable to cache that reply effectively. To configure WebSphere portal to not send the vary header to IE 7, log in as portal administrator and navigate to Administration
Caching Proxy Tuning
The following are the settings and tunings specified in the reverse proxy’s ibmproxy.conf file for the Web 2.0 performance test.
Table 17: Reverse Proxy Settings
Parameter | Setting Used | Additional Information |
|
|
|
Proxy /wps/* | Proxy for /wps | |
|
| |
Proxy /wps_semanticTag* http://{server- | Proxy for /wps_semanticTag | |
name}/wps_semanticTag* :80 |
| |
|
| |
Proxy /searchfeed* | Proxy for /searchfeed | |
|
|
|
ConnThreads | 15 |
|
|
|
|
ServerConnPool | on |
|
|
|
|
MaxSocketPerServer | 20 |
|
|
|
|
CacheTimeMargin | 5 seconds |
|
|
|
|
CacheFileSizeLimit | 2 M |
|
|
|
|
flexibleSocks | off |
|
|
|
|
LimitRequestFieldSize | 16384 |
|
|
|
|
CompressionFilterEnable | C:\PROGRA~1\IBM\edge\ |
|
| cp\Bin\mod_z.dll |
|
|
|
|
CompressionFilter | Image/bitmap,text/css,text/ | Compresses everything except text/html, |
AddContentType | xml,application/xml | application/atom+xml, text/plain, |
|
| |
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| compresses those types. Experiments |
|
| were done where reverse proxy gzipped |
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| those files as well which caused the |
|
| reverse proxy CPU to become a |
|
| bottleneck. If a more powerful reverse |
|
| proxy server was available, it might make |
|
| sense to do all gzipping on the reverse |
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| proxy. Note that fixes for PMR 43866,499 |
|
| were applied to Edge Server v6.02 to get |
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| proper gzipping behavior. |
|
|
|
3 1
W E BS P HE R E P O R T AL V 6 . 1 T U N I N G G U I D E
