This document is very useful for tunning waits.

Can you please clarify the following.

WAIT_RATIO
-------- ----------------------------------- ------------------------------
13 db file sequential read INVENTORY_PK 85 ===> what does this wait ratio indicate.
13 db file scattered read STORES 10     10
13 db file sequential read ITEMS_PK      2 

1] Is it 85% .. ,out of 100% spent for executing the query.

2] how can we measure the value 85 in terms of minutes/secons etc in lay man language.

Appreciate you kind response on the above query.

thanks,

bipsy.