After a few more attempts at leaning on F5, I am indeed getting multiple "Initializing"-lines in the logfile.
Then this occurred to me:
root@myserver:/usr/local/lib/site_perl/U2D# ps aux | grep apa
root      9546  0.0  0.3 148856  9920 ?        Ss   13:16   0:00 /usr/
+sbin/apache2 -k start
www-data  9549  0.0  0.3 173424  9880 ?        S    13:16   0:00 /usr/
+sbin/apache2 -k start
www-data  9550  0.0  0.3 173424  9860 ?        S    13:16   0:00 /usr/
+sbin/apache2 -k start
www-data  9551  0.0  0.3 173424  9860 ?        S    13:16   0:00 /usr/
+sbin/apache2 -k start
www-data  9552  0.0  0.3 173424  9860 ?        S    13:16   0:00 /usr/
+sbin/apache2 -k start
www-data  9553  0.0  0.3 173424  9860 ?        S    13:16   0:00 /usr/
+sbin/apache2 -k start
www-data  9618  0.0  0.3 173424  9860 ?        S    13:19   0:00 /usr/
+sbin/apache2 -k start
root      9723  0.0  0.0   7624   920 pts/0    S+   13:20   0:00 grep 
+apa
root@myserver:/usr/local/lib/site_perl/U2D# grep Initializing /var/www
+/testSharing.log
02-08-2011 13:19:38:736 9549-172922688: Initializing fruits.
02-08-2011 13:19:39:361 9550-172922688: Initializing fruits.
02-08-2011 13:19:39:426 9551-172922688: Initializing fruits.
02-08-2011 13:19:39:457 9552-172922688: Initializing fruits.
02-08-2011 13:19:39:480 9553-172922688: Initializing fruits.
02-08-2011 13:19:39:499 9618-172922688: Initializing fruits.

[download]
Which leads me to think that for each running instance of apache2, the variable will have to be initialized at least once. Or is that too shortsighted?

In reply to Re^2: Threaded MPM Sharing Variables (this time with complete test code) by Neighbour
in thread Threaded MPM Sharing Variables (this time with complete test code) by busymeister

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