cics too slow

Hi,

I made a profile of cobol application with cics and Ibm UDB in Mainframe Express where I find always this paragraph "DFH-MF-LINK-PROCESS"

Total time: 40404 milliseconds. Module called 5 times.
% time time entries ms/entry paragraph
-------------------------------------------------------------------------------
84.68 34213 49 698 DFH-MF-LINK-PROCESS
2.55 1030 3 343 M9700-SELECT-GFAGAWL OF MFECM-START-PDIV
1.89 765 1 765 M8010-SELECT-GFAGAAT OF MFECM-START-PDIV
1.66 671 1 671 M8300-SELECT-GFAGACH OF MFECM-START-PDIV
1.43 576 17 34 FOJ010-SELECT-DIZNOBJ OF MFECM-START-PDIV
1.39 561 5 112 IT0000-INIZIALIZZA-TABELLA OF MFECM-START-PDIV
1.19 482 6 80 M9500-SELECT-GFTGTGK OF MFECM-START-PDIV
0.54 219 4 55 M9100-SELECT-GFAGAAG OF MFECM-START-PDIV

what is DFH-MF-LINK-PROCESS and why does it take so long?

thanks

bye