Problems that occur at specific times of the day or affect specific users

Use this topic to review IBM MQ problems that occur at specific times of the day or specific groups of users.

If the problem occurs at specific times of day, it might be that it is dependent on system loading. Typically, peak system loading is at mid-morning and mid-afternoon, and so these periods are the times when load-dependent problems are most likely to occur. (If your network extends across more than one time zone, peak system loading might seem to occur at some other time of day.)

If you think that the IBM MQ for z/OS system has a performance problem, see Dealing with performance problems on z/OS.

If the problem only affects some users, is it because some users do not have the correct security authorization? See User IDs for security checking for information about user IDs checked by IBM MQ for z/OS.

Parent topic: Making initial checks on z/OS