- MaxChannels=100|number
-
The maximum number of channels allowed.
The default is 100.
- MaxActiveChannels=MaxChannels_value
-
The maximum number of channels allowed
to be active at any time. The default is the value specified on the MaxChannels attribute.
- MaxInitiators=3|number
- The maximum number of initiators.
- MQIBindType=FASTPATH|SHARED
-
The binding for applications:
- FASTPATH
- Channels connect using MQCONNX FASTPATH; there is no agent
process.
- SHARED
- Channels connect using SHARED.
- PipeLineLength=1|number
- The maximum number of concurrent threads a channel will use. The default
is 1. Any value greater than 1 is treated as 2.
When you use pipelining,
configure the queue managers at both ends of the channel to have a PipeLineLength greater than 1.
Note:
Pipelining is only effective for
TCP/IP channels.
- AdoptNewMCA=NO|SVR|SDR|RCVR|CLUSRCVR|ALL|FASTPATH
- If WebSphere MQ receives a request to start a channel, but finds that an amqcrsta
process already exists for the same channel, the existing process must be
stopped before the new one can start. The AdoptNewMCA attribute
allows you to control the end of an existing process and the startup of a
new one for a specified channel type.
If you specify the AdoptNewMCA attribute for a given channel type, but the new channel fails to start
because the channel is already running:
- The new channel tries to stop the previous one by requesting it to end.
- If the previous channel server does not respond to this request by the
time the AdoptNewMCATimeout wait interval expires, the process (or the thread)
for the previous channel server is ended.
- If the previous channel server has not ended after step 2, and after the
AdoptNewMCATimeout wait interval expires for a second time, WebSphere MQ ends the
channel with a CHANNEL IN USE error.
Specify one or more values, separated by commas or blanks, from
the following list:
- NO
- The AdoptNewMCA feature is not required. This is the default.
- SVR
- Adopt server channels.
- SDR
- Adopt sender channels.
- RCVR
- Adopt receiver channels.
- CLUSRCVR
- Adopt cluster receiver channels.
- ALL
- Adopt all channel types except FASTPATH channels.
- FASTPATH
- Adopt the channel if it is a FASTPATH channel. This happens only if
the appropriate channel type is also specified, for example, AdoptNewMCA=RCVR,SVR,FASTPATH.
Attention!
The AdoptNewMCA attribute might behave in an unpredictable fashion with
FASTPATH channels. Exercise great caution when enabling the AdoptNewMCA attribute for FASTPATH channels.
- AdoptNewMCATimeout=60|1 - 3600
-
The amount of time, in seconds,
that the new process waits for the old process to end. Specify a value in
the range 1 - 3600. The default value is 60.
- AdoptNewMCACheck=QM|ADDRESS|NAME|ALL
- The type of checking required when enabling the AdoptNewMCA attribute.
If possible, perform all three of the following checks to protect your channels
from being shut down, inadvertently or maliciously. At the very least, check
that the channel names match.
Specify one or more values, separated by
commas or blanks, to tell the listener process to:
- QM
- Check that the queue manager names match.
- ADDRESS
- Check the communications address. For example, the TCP/IP address.
- NAME
- Check that the channel names match.
- ALL
- Check for matching queue manager names, the communications address,
and for matching channel names.
AdoptNewMCACheck=NAME,ADDRESS is the default for FAP1,
FAP2, and FAP3, while AdoptNewMCACheck=NAME,ADDRESS,QM is the default
for FAP4 and later.