Table timeout/lifetime Not Reflected in -count

set session_count 0

 

foreach { key } [table keys -subtable $table_subname] {

 

set key_timestamp [table lookup -notouch -subtable $table_subname $key]

 

incr session_count 1

 

}just wonder if this is all calculation key count code. it seems session_count must be equal to a number of key in subtable (since it is increased in each loop. how come is result different??