Disk write became high

Hello.

I have strange technical problem and I haven't any idea what cuses it.
I am running RedHat 7.2, Plesk 5 (HDD 60 Gb WD ). Also I use mrtg for checking some stats. One of my graphs shows Disk read/write. Previously average disk write was about 300-500 blocks per second but a few days ago it jumped up to 1100-1400 suddenly.

What could be the reason of increasing the Disk writing activity in 2,5 times ?

Had anybody similar problem?

Any advise will be appreciated.

Alexander.

 

 

 

 

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