Real Type
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3.0
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Using approximate data types such as float and real can save lots of storage when the exact number is not required. In case of performance data this is not a problem even if we are out by few KBs in a GB scale.
For example, reading file statistics sys.dm_io_virtual_file_stats gives the following value for num_of_bytes_read:
1447418880
In a Real data type this would be:
1.447419E+09
Quick conversion to Mega Bytes reveals negligible loss of accuracy:
Taking it one step further and simulating even larger number:
And even bigger 2705311284433920 bytes:
