PSA Sleep mysql process

[Azurel]

Hello.

mysql> SHOW FULL PROCESSLIST;
+-------+-------+-----------+------+---------+------+-------+-----------------------+
| Id | User | Host | db | Command | Time | State | Info |
+-------+-------+-----------+------+---------+------+-------+-----------------------+
| 4424 | admin | localhost | psa | Sleep | 771 | | NULL |
| 19769 | admin | localhost | NULL | Query | 0 | NULL | SHOW FULL PROCESSLIST |
+-------+-------+-----------+------+---------+------+-------+-----------------------+
2 rows in set (0.00 sec)

What is this for a sleeping mysql process? I have call "KILL 4424;" and now its gone. Was that wrong?

Domains are working. Plesk working too.