HELP!  Gateway stops accepting new connections

Config: PS6.1 on Solaris 9 (Sparc), seperate gateway on Solaris 9 (Sparc) The PS6.1 was migrated from a PS3.0 installation, The machines are V240 with 2GB RAM and 4GB swap.
I start the GW with: ./S43gateway -n default start debug
Several minutes after startup (it varies from 1 to 40) I get the following message:
Class Name: com.sun.portal.rproxy.rewriter.services.idsame.IDSAMEDataServiceStub04/02/2004 07:29:07:823 PM CST: Thread[Thread-14,5,main]
ERROR: RemoteHandler : ERROR on remote machineAfter a while, something will trigger the following set of messages and that's when the gateway stops accepting new connections.
ESessionMsg caught exception when reading:
java.io.EOFException
        at java.io.DataInputStream.readFully(DataInputStream.java:153)
        at com.sun.portal.netlet.econnection.ESessionMsg.readMsg(ESessionMsg.java:24)
        at com.sun.portal.netlet.eproxy.EProxyConnection$ESessionThread.run(EProxyConnection.java:114)
        at com.sun.portal.util.ThreadPoolThread.run(GWThreadPool.java:109)
java.lang.OutOfMemoryError
        <<no stack trace available>>The OutOfMemoryError will keep coming out for a while, why it stops, I don't know. When this does happen, the java process is only using about 220MB of RAM and only about 10 users are logged-in.
This was working fine until we changed the IP of the gateway and moved its ethernet connection to "outside" the firewall. I re-installed the gateway software to make sure I didn't miss anything other than platform.conf. I have the webproxy enabled for the bookmarks channel and that is working. I have holes in the firewall for the proxy, LDAP and HTTPS ports.
Any ideas?
Thanks,
Roger S.

The gateway has to be tuned substantially to get good performance.
The tuning needs to be based on your load
e.g how many netlet connections, how many concurrent users you expected to handle etc ..
the default min heap size and max heap size need to change it. You can go upto a max of 2 Gb but I would recommend starting with a smaller heap size of 500 M and see how your performance goes.
The min and max heap size should always be the same for better performance. If your using netlets then you have to change the thread parameter. Each netlet connection uses two threads so if your using a large number of netlet connections then your thread count needs to 500 at a minimum to support 200 concurrent netlet sessions. Increasing the thread pool will also use more memory as each thread uses a min of 512 K of memory. The thread stack size needs to be set to 128 K.
These are the initial things to start with, you can also set jvm option -verbose:gc to enable gc logs. This will show memory usage.
These are good things to start with ..

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