Dumps
Dumps are an important source of detailed information about problems. Whether they are as the result of an abend or a user request, they allow you to see a "snapshot" of what was happening at the moment the dump was taken. WebSphere MQ dumps contains guidance about using dumps to locate problems in your WebSphere MQ system. However, because they only provide a "snapshot", you might need to use them in conjunction with other sources of information that cover a longer period of time, such as logs.
Snap dumps are also produced for specific types of error in handling MQI calls. The dumps are written to the CSQSNAP DD.