I was researching @SERVERSTATUS, found this post in the list archive, and wanted to add some more information.
The Tango 2000 config application had a server status component. It included alternate descriptions for each @SERVERSTATUS value than those found in the documentation. For example, it included these descriptions for NumUsersShared, NumVarsShared , NumUsersLocal, and NumVarsLocal:
Shared Keys: The number of keys in the shared variable store. Equal to the total of: the number of users with non-expired variables, the number of domains with unexpired domain scope variables, and the number of unique custom scopes with unexpired variables.
Shared Vars: The number of variables in the shared variable store.
Local Keys: The number of keys in the local variable store or the total number of current TAF executions with local variables.
Local Vars: The number of variables in the local variable store or the total number of the above TAFs' local variables.
Very helpful information (and probably should be in the official docs). It pretty much confirms your thoughts on NumUsersShared.
It's interesting that NumUsersLocal always returns 1 for you; it always returns 3 for me; probably has something to do with my TAF or machine config.
One thing I would like to see in @SERVERSTATUS is the ability to get the number of user/domain/custom scope variables individually, not added up like in NumUsersShared.
Eric
At 06:42 PM 8/7/2003, you wrote:
I tried what you did and got the same results. After trying a few more things, this is what I've found:
-- The app server has NumUsersShared = 2 upon startup (not sure why). NumUsersShared does not go up when USERREFERENCE values are assigned to browsers. It goes up once a user-scoped or domain-scoped variable is assigned. If a browser gets a USERREFERENCE but your code never assigns any variables, then that USERREFERENCE doesn't have anything in the shared variable store and therefore doesn't show in NumUsersShared. Since this value goes up for both domain and user scopes, I doubt it can be used to determine how many users you have with variables assigned. This behavior seems contrary to the the documentation.
-- NumVarsShared = 22 when the server starts (not sure why, but some must be for things like domain$variableTimeout). NumVarsShared will go up by 1 for each domain-scoped variable assigned. It will go up by 2 for the first user-scoped variable assigned (one for the assigned var and one for user$variableTimeout). After the first user-scoped assignment, NumVarsShared goes up by one for each additional assignment in the same USERREFERENCE.
-- NumUsersLocal is always 1 in my tests. I guess this makes sense, since only one USERREFERENCE will apply to a single request. But I wonder why we can inspect this value if it's always the same.
-- NumVarsLocal appears to show the number of defined local (request) scoped variables in the current request's processing, which also makes sense.
-- All of the above holds true across <@DOMAIN>s. However, separate <@DOMAIN>s will have separate instances of domain-scoped variables. Therefore, all variable instances will add up for NumUsersShared and NumVarsShared.
(I didn't test with instance, method or application scopes.)
It seems the shared variable store is a memory area that all threads can access, while the local variable store is only accessible from the thread that created it. (I was thinking maybe shared variables are copied to the local store for each request, but that would be kinda silly.)
This has answered my questions for now.
Thanks, - Jeff
--Ya'Know I am not really sure what all the numbers means so I put it to the test
I created a taf with 1 results action equaling <@USERREFERENCE> <hr> <@SERVERSTATUS>
I then open three separate instances of the browser and call the taf. Each browser instance had it's own userreference. But NumUsersShared stayed at 2
So for using it to determine number of defined, Well? I don't really know, Your mileage may vary ;-)
Ben Johansen - http://www.pcforge.com Authorized Witango Reseller http://www.pcforge.com/WitangoGoodies.htm Authorized MDaemon Mail Server Reseller http://www.pcforge.com/AltN.htm
-----Original Message----- From: Jeffrey Bohmer [mailto:[EMAIL PROTECTED] Sent: Thursday, August 07, 2003 12:15 PM To: [EMAIL PROTECTED] Subject: Witango-Talk: @SERVERSTATUS variable store question
Witango 5.0.1.062 / OS X 10.2.6
From the <@SERVERSTATUS> docs:
Category Description NumUsersShared number of user references in the shared variable store NumVarsShared number of variables in the shared variable store NumUsersLocal number of user references in the local variable store NumVarsLocal number of variables in the local variable store
What is the difference between the shared variable store and the local variable store?
To determine the number of user references defined on the app server I should look at NumUsersShared, correct?
- Jeff
Jeffrey Bohmer VisionLink, Inc. _________________________________ 303.402.0170 www.visionlink.org _________________________________ People. Tools. Change. Community. ________________________________________________________________________ TO UNSUBSCRIBE: Go to http://www.witango.com/maillist.taf
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