The "Times the MAXTASK limit reached" indicates whether MXT is constraining your system, or any possible integrity exposures are resulting from forced resolutions of UOWs relating to the transactions. The only time that you may need to constrain your system in this way is to reduce virtual storage usage. As most CICS® virtual storage is above the 16MB line you may be able to run your system without MXT constraints, but note that CICS does preallocate storage, above and below the 16MB line, for each MXT whether or not it is used. Changing MXT affects your calculations for the dynamic storage areas. See Setting the maximum task specification (MXT) for more information.
For more information about transaction manager statistics, see topic Transaction statistics.