MariaDB I/O capacity with innodb_io_capacity parameter I use hdparm to test my SSD hard drive I/O benchmark :

[root@mail ~]# hdparm -t -T /dev/xvda2

/dev/xvda2:
 Timing cached reads:   12906 MB in  1.99 seconds = 6477.79 MB/sec
 Timing buffered disk reads: 1650 MB in  3.00 seconds =  550.21 MB/sec


I saw innodb_io_capacity parameter for MariaDB is :

Storage type The innodb_io_capacity value
HDD 200
RAID 10 HDD 1,000
SSD 5,000
Fusion IO 10,000


Could some body please tell me which value i should use in this case ?
It looks to me that you should increase that parameter - what I would advise is that you set up database benchmarking  and vary the parameter in steps of 1000 until you find a sweet spot. There are any number of MySQL benchmarks - sysbench for example. You could try mysqlslap - it's "quick and dirty" but should be good for a first approximation - 1, 2, 3, 4, 5 and check out the documentation. I've been messing with this recently so I have the links to hand.