NETTYPE

syntax

NETTYPE protocol,poll_threads,connections,VP_class

The protocol value is required. You cannot use any white space in the fields, but you can omit trailing commas.

onconfig.std values

On UNIX: None
On Windows NT: onsoctcp,1,NET

if not present

protocol:

• On UNIX: nettype field from the sqlhosts file (optionally minus the database server prefix of on or ol)
• On Windows NT: onsoctcp

poll_threads: 1connections: 50VP_class: NET if for DBSERVERALIASES; CPU if for DBSERVERNAME

units

poll_threads: NUMCPUVPS
connections: Number of connections

separators

Commas

range of values

protocol:

• Same as the nettype values (with or without the database server prefix of on or ol) that are accepted in the sqlhosts file

poll_threads:

• If VP_class is NET, a value greater than or equal to 1
  If VP_class is CPU, 1 through NUMCPUVPS

connections:

1 through 32,767

VP_class:

CPU = CPU VPs NET = Network VPs

takes effect

When shared memory is initialized

refer to

The following sections in the IBM Informix: Administrator's Guide:

• The nettype and protocol field in the chapter on client/server communications
• Network virtual processors in the chapter on virtual processors and threads
• Should poll threads run on CPU or network virtual processors in the chapter on virtual processors and threads

The NETTYPE parameter usually provides tuning options for the protocols that dbservername entries define in the sqlhosts file or registry.

Each dbservername entry in the sqlhosts file or registry is defined on either the DBSERVERNAME parameter or the DBSERVERALIASES parameter in the ONCONFIG file.

The NETTYPE configuration parameter describes a network connection as follows:

• The protocol (or type of connection)
• The number of poll threads assigned to manage the connection
• The expected number of concurrent connections per poll thread
• The class of virtual processor that will run the poll threads

You can specify a NETTYPE parameter for each protocol that you want the database server to use. The following example illustrates NETTYPE parameters for two types of connections to the database server, a shared memory connection for local clients and a network connection that uses sockets:

NETTYPE ipcshm,3,,CPU
NETTYPE soctcp,,20,NET 

The NETTYPE parameter for the shared-memory connection (ipcshm) specifies three poll threads to run in CPU virtual processors. The number of connections is not specified, so it is set to 50. The NETTYPE parameter for the sockets connection (soctcp) specifies that only 20 simultaneous connections are expected for this protocol and that one poll thread (because the number of poll threads is not specified) will run in a network virtual processor (in this case, SOC).