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Rao_S

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Can monitoring an Index cause an overhead?

Can monitoring an Index cause an on the table..? If something like this..is defined on the table where index in question is a partitioned index?
ALTER INDEX XXXXX01.XQT_IT_YYYYYY_SEQ_N7
  MONITORING USAGE;
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how to find out if a particular index is being used at all..?
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if a index is not being used at all and if it exits, then just the existence of the index is an overhead..?
 
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i have attached an file ..where i was trying a query to check if N6 index is being used... let me know what you think....
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sorry here is the file.... index-check.txt
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your plan shows the n6 index isn't used in this particularly query, but that doesn't mean it's not used somewhere else in the application
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thank you all!!!