Regarding Overflow segments in IOT

Question

can any one please tell me what will be contents of the overflow segments in an IOT.
documentation says
An OVERFLOW clause, which preserves dense clustering of the B-tree index by storing the row column values exceeding a specified threshold in a separate overflow data segment. This data segment can be in another tablespace also.
An OVERFLOW clause, which preserves dense clustering of the B-tree index by enabling the storage of some of the nonkey columns in a separate overflow data segment.
during the insert operations if the data extent threshold limit is reached it alloates a overflow segment right..
in the documentation it also says that non key columns in the table are also stored in the overflow segments.
CAN ANY ONE TELL ME WHAT WILL BE THE CONTENTS OF INDEX SEGMENTS AND OVERFLOW SEGMENTS FOR THE FOLLOWING TABLE.
CREATE TABLE admin_docindex2(
token CHAR(20),
doc_id NUMBER,
token_frequency NUMBER,
token_offsets VARCHAR2(512),
CONSTRAINT pk_admin_docindex2 PRIMARY KEY (token, doc_id))
ORGANIZATION INDEX
TABLESPACE admin_tbs
PCTTHRESHOLD 20
INCLUDING token_frequency
OVERFLOW TABLESPACE admin_tbs2;

Answer 1

The contents of the oveflow segment will be all columns defined after the including token_frequency column, in your case the token_offsets column.
As definitions for all the remaining columns within the index structure are relatively small, the pctthreashold value of 20% is not likely to come into play.
Cheers
Richard Foote
http://richardfoote.wordpress.com/