It is unclear from your post. Is IBM saying that there are 65k sockets in finwait / finwait2 ? Or just that there are no available sockets? If you have reserved a ton of ports, it is possible to artificially constrain the system. I was at a shop that had locked down all the ports ( in the name of PCI ) except a few hundred and they were experiencing something similar.
Rob Schramm On Thu, Apr 14, 2016, 10:50 AM Tracy Adams <[email protected]> wrote: > So an update to my quest of knowledge... > https://en.wikipedia.org/wiki/Unix_domain_socket and > http://www.thomasstover.com/uds.html > > The bottom line is this form of "socket" is integral for any process to > process communication not just networking, amy I going down the right path? > > ________________________________________ > From: IBM Mainframe Discussion List <[email protected]> on behalf > of Tracy Adams <[email protected]> > Sent: Thursday, April 14, 2016 9:38 AM > To: [email protected] > Subject: OMVS (TCPIP) internals question > > I am trying to understand the function of TCPIP and its "max sockets". We > are experiencing a problem that happens infrequently where our CICS > application closing down the DataPower port with an error that indicates > max sockets has been reached. IBM support has confirmed this in a dump. > They say our max and current values are at 65,535 when the dump was > initiated and to increase our maxsockets setting in BPXPRMxx. We are set > at the default of 64000. Its maximum value is 16 million. This parameter > is in the "network" definition of a "a single sockets file system". > > > What I am grappling with is what is a "single sockets file system" and how > the heck can we be hitting 65k units of anything? We are not that big! > (so I think) So who and what consumes all these entries in this single > socket file system? How can I monitor this? Netstat shows active > connections between 700 - 900 so I don't believe this is the right spot to > be looking. > > > Quick explanations would be great, recommendations on readings that will > clarify would be awesome as well. > > > TIA, > > > Tracy > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Rob Schramm The Art of Mainframe, Inc ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
