Sorry for the off-topic, I have a problem with the authentication regarding the Radius with MySQL database. There are about 12k users who authenticate to 2 Radius servers and 1 MySQL. Accounting is done every 5 minutes and the IPs are in a PostgreSQL base. How much of the network is wireless during storms (I live in a tropical country) have to disconnect multiple users and when the station is restored have problems of "No DB Handles" which creates duplication of IP addresses in some cases. I have made some tests with various settings in MySQL, different file systems and when increasing the number of clients connecting to the system IO Wait begins to increase. When I make an appointment for an extract over a period of time a little bigger or my system performs the calculation of access franchise the situation worsens. See setups reports of Freeradius + MySQL in larger environments. Would advise evaluate PostgreSQL? Any suggestions to optimize the system? In the tests used a softraid (I know) and deactivated the Ext4 journaling on which gave me a good improvement. But do not feel comfortable working with the double filesystem + softraid, the more without journaling. I thank in advance the opinions on this subject. Under my system: OS: CentOS 7 Mem: 12G CPU: Xeon (R) CPU E5620 @ 2:40 BD: MariaDB 10.0.16 FS: EXT4 or XFS Raid: 10 (6 SATA disks 2TB 7200 RPM 64MB WD2003FYYS Cache SATA 3.0Gb / s) att Michell