ISTAT produces a summary of the item distribution for a file and analyzes the structure of groups within the file. This item distribution summary can help you determine whether the current file structure is the best one for the file.
The following example shows the result of the ISTAT command run on the Master Dictionary of an account:
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>ISTAT MD FILE= MD MODULO= 7 15:36:03 DD MMM YYYY FRAMES BYTES ITMS 1 1006 45 *>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1 595 28 *>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1 787 38 *>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1 898 42 *>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1 643 33 *>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1 862 45 *>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 1 1219 49 *>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 7
ITEM COUNT= 280, BYTE COUNT= 6010, AVG.BYTES/ITEM= 21.4 AVG.ITEMS/GROUP=40.0,STD.DEVIATION=7.4,AVG.BYTES/GROUP= 858.5 |
You can see that items are distributed evenly, with an average of 40 items in each group.
See Also