MAXSOCKETS specifies the maximum number of sockets that can be obtained for a given file system type.

If you are using AF_UNIX, MAXSOCKETS is ignored and the system uses a value of 10000.

You can use the USS_MAXSOCKETS_MAXFILEPROC check provided by IBM® Health Checker for z/OS® to determine whether the MAXFILEPROC value is set too low. For more details about IBM Health Checker for z/OS, see IBM Health Checker for z/OS or IBM Health Checker for z/OS: User's Guide.