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From Tim Bannister <>
Subject Re: The Case for a Universal Web Server Load Value
Date Wed, 14 Nov 2012 19:01:35 GMT
On 14 Nov 2012, at 18:49, Ask Bjørn Hansen wrote:

> I really like how Perlbal does it:
> It opens a connection when it thinks it needs more and issues a (by default, it's configurable)
"OPTIONS *" request and only after getting a successful response to the test will it send
real requests on that connection (and then it will keep the connection open with Keep-Alive
for further requests).

X-Server-Load: would still be an improvement, eg with this response to OPTIONS:
HTTP/1.1 200 OK
Date: Wed, 14 Nov 2012 19:00:00 GMT
Server: Apache/2.5.x
X-Server-Load: 0.999

…the balancer might decide to use a backend that is reporting a lower load.

Tim Bannister –

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