Initially when we started to use Oracle VM we did lot of performance testing and at that point we went with Paravirtualized VM’s (PVM) due to better performance we saw with them. Now with our recent upgrade to Oracle VM 3.4.2 if you are using hugepages (we do!) then hugepages are not supported anymore with…
Optimizing performance for Oracle VM when using iSCSI storage
We implemented Oracle VM 3.3.2 around two years ago and biggest issue we had was using iSCSI storage having sub-optimal latency and throughput with parallel sessions and high load in our performance tests. In the end this was resolved by linux disk partition alignment and few iSCSI optimizations. Problem After doing the initial Oracle VM installation we started…
Oracle OVS, Broadcom Netextreme II and 10G network
We recently upgraded our LAN network from 1G to 10G but the Oracle OVS servers network cards showed only 1G link even though the advertised link was 10G. [root@ovs1 ~]# ethtool em1 Settings for em1: Supported ports: [ FIBRE ] Supported link modes: 1000baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Advertised link…
Exadata & metric_iorm.pl
Our case where to gather information was actually related to two disks going OFFLINE at the same time. As I wasn’t sure if this is normal Exadata behavior I went and created Service Request for this. This is what we saw one day: 4_1 2017-01-04T18:54:05+01:00 warning “Data hard disk entered confinement offline status. The LUN…