Question on percentage of memory sorts

Hi all,
What percentage of memory sorts base on this sql statement below is good? Is that greater than 95%
SELECT 'percentage or memory sorts',
ltrim(to_char(trunc(((b.value-a.value)/b.value)*100,3)))||'%'
FROM v$sysstat a, v$sysstat b
WHERE a.name = 'sort (disk)'
AND b.name = 'sorts (memory)';
Thank you,
Kevin

The more memory sorts youhave, it represents health system, specially in OLTP system. But if you have Data Warehousing, lower number of Memory sort is also acceptable. It's very difficult to say the number about mermoy sort. But the higher the number it's good. Again, what kind of the system you have that is also important.

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