Re: Understanding the difference between conn vs. child vs. slot

Michael Conlen <m@xxxxxxxxxx> · Tue, 2 Oct 2007 23:02:13 -0400

A slot is a placeholder for a child. There may or may not be a child  

there depending on max/min spare servers. A child is a process or a  

thread that handles requests. A connection is a link between a client  

and a child which resides in a slot.

In this case there is 1 request from the connection to a child which  

has served 10,216 requests which is residing in a slot which has  

served 15,022. The difference between the last two of ~4,800 requests  

are requests to that slot which were processed by a child (thread or  

process) which was subsequently terminated. Child termination can  

happen because max spare servers was exceeded or for any number of  

other abnormal reasons (process crashing). There may be other normal  

reasons such as max number of requests per child.

--
Michael Conlen

On Oct 2, 2007, at 9:24 PM, Robinson Craig wrote:

Hi,

I've recently been pouring over some server status pages, and I am

trying to understand what the difference between a connection,  

child and

slot. In particular, referring to the "Acc" column, which is the  

"Number

of accesses this connection / this child / this slot".

Example "Acc" data for the homepage of our intranet is as follows:
1/10219/15022

I'm pretty comfortable with what a connection and a child is, BUT...

What is a "slot"? And what do they really mean when they refer to an
"access"?

Any pointers would be appreciated?

Cheers, Craig

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