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Poor Disk I/O performance Oracle Linux 7.4 (PVHVM) with Oracle VM 3.4.4

in Linux Operating System (MOSC) Question

Hi there. I have Oracle VM 3.4.4 with guest windows server 2016  (PVHVM) and oracle linux 7.4. (PVHVM). The windows server virtual machines are getting an excelent disk I/O performance but the oracle linux 7.4 are too bad. Oracle support requested me to apply the following configuration /etc/modprobe.conf /etc/modprobe.d/xen_blkfront.conf  (options xen_blkfront max_indirect_segments=256  options xen_blkfront max_ring_page_order=4) but i still are getting the same result. Any idea about how to fix this?

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