Question about FCF and Oracle load Balance

Question

We have recently set up the FCF and load balance advisory.
We are using JDBC UCP connection Pool.
Here is the service name is as following:
CATEST_FCF =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ptt-pt-ildb-01-vip)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = ptt-pt-ildb-02-vip)(PORT = 1521))
(LOAD_BALANCE = yes)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = CATEST_FCF.THECPP.COM)
(FAILOVER_MODE =
(TYPE = SELECT)
(METHOD = BASIC)
(RETRIES = 180)
(DELAY = 5)
-- service goal is SERVICE_TIME and CLB_GOAL is LONG
-- ons.config
localport=6101
remoteport=6200
loglevel=9
useocr=on
I was trying some test as the link below.
http://drdobbs.com/java/222700353?pgno=1
but my client is always trying to connect to instance 2 even the sys.sys$service_metrics_tab already showed the instance 1 can take on more load.
Total held connections: 9
[0] Instance name [TZNTEST2]
[1] Instance name [TZNTEST2]
[2] Instance name [TZNTEST2]
[3] Instance name [TZNTEST2]
[4] Instance name [TZNTEST2]
[5] Instance name [TZNTEST2]
[6] Instance name [TZNTEST2]
[7] Instance name [TZNTEST2]
[8] Instance name [TZNTEST2]
(CATEST_FCF, VERSION=1.0 database=CATEST service=CATEST_FCF { {instance=CATEST1 percent=88 flag=GOOD}{instance=CATEST2 percent=12 flag=GOOD} } timestamp=2011-04-12 11:59:36)
am I correct here? the percent for CATEST1 is 88. Does it mean CATEST1 is able to take on 88% more load, so it is more attractive now?
and why the connections always fell on CATEST2? How does oracle calculate the number of connections to each instance. Does it count inactive or killed session too? does it offer the load balance stats based on total number of connections on each instance or total number of connections just to this serivce on each instance?

Answer 1

I don't know if this helps, but there is a reply comment from
Macromedia at the bottom of the MX 6 LiveDocs for tag
cfprocparam
which was in response to a comment pointing out that calling
overloaded stored procedures containing refcursors did not work. (I
submitted a similar question to Adobe last night in the MX 7
version of LiveDocs for cfprocparam and am waiting for it to post.)
Macromedia jrunrandy said on Jun 30, 2005 at 9:45 AM :
I checked and regret to say that this isn't supported. There
is a bug for this issue,
53122, but it hasn't been addressed as of CFMX 7.
I think that this is going to be as official of a response
from Macromedia/Adobe as you are going to get unless you open a
trouble report yourself. I hope that this is enough to satisfy the
requirements of your DBA. Otherwise, you are probably going to have
to shell out the cash for an official trouble report to Adobe
(unless you have paid support).
Phil