MPE/iX 5.5 Operating System Limits

file system recognizes the descriptor is sockets file type descriptor and then let NWTM
do the read/write operation as requested.
Each socket that is bound to a Network protocol, has a unique NWTM entry. Thus the
max.number of NWTM entries limits the number of sockets that could be concurrently
used by the applications on the system.
The max.number of NWTM entries ,as of MPE 6.0 ,is
# MAX_NUM_TYPE_MGRS 5632
Notice that this value is significantly lower than the MAX_NUM_SOCKET_RECORD .
What this mean is that effectively the max number of sockets that could be in use is
limited to 5632.
NWTM entries are kept in the table management object that resides in the SR6/SR7
space. The max object size limits the max. number of NWTM entries to 5632.
Transport layer protocols
TCP - transmission control protocol
TCP keeps connection entry table, where one entry is allocated per connection. This
object is SR6/SR7 space. With 6.0, the maximum number of TCP connection supported
is 6090. This value is configurable through NMMGR.
#TCP_MAX_CONNECTIONS = 6090
One important thing to note here is that, for each connection there is one associated
NWTM entry. Since the maximum number of NMTM entries is limited to 5632, the
maximum number of connections that could be used is also limited to 5632.
The Maximum number of TCP call sockets supported is #6090.
#TCP_MAX_SOCKETS = 6090;
A call socket is a TCP socket created by a Upper Layer Protocol (ULP) , like
NetIPC/BSD Sockets to rendezvous with incoming connection requests Note that the
term 'socket' ,as mentioned at TCP level is different from the term 'socket' decribed at the
NetIPC/BSD sockets level. Here the term 'socket' refers to a logical entity which provides