stick-table ,show table, use field

[Arnall]

Hello everyone,

when using socat to show a stick-table i have lines like this :
# table: dummy_table, type: ip, size:52428800, used:33207

0x7f202f800720: key=aaa.bbb.ccc.ddd use=0 exp=599440 gpc0=0 
conn_rate(5000)=19 conn_cur=0 http_req_rate(10000)=55

../...

I understand all the fields except 2 :

used:33207

use=0

I found nothing in the doc, any idea ?

Thanks.