Hi, zabbix some time duplicate values in history table (I use mariadb)
That not critical, but useless

Why i think that make a sense:
1. It's a nonsense when DB have same or different values for that unique itemid+clock+ns
2. That allow make itemid+clock+ns as primary key on history tables
3. That reduce size index and db
4. That will not break anything

For me that also have a sense, because i can change TokuDB scheme for history tables, set primary keys and drop secondary indexes

Thanks