Artikelen gelabeld: I/O bottlenecks

Baking a cake: trading CPU for IO?


Sometimes I hear people claim that by using faster storage, you can save on database licenses. True or false? The idea is that many database servers are suffering from IO wait – which actually means that the processors are waiting for data to be transferred to or from storage – and [...]

Oracle ASM vs ZFS on XtremIO


Background In my previous post on ZFS I showed how ZFS causes fragmentation for Oracle database files. At the end I promised (sort of) to also come back on topic around how this affects database performance. In the meantime I have been busy with many other things, but ZFS issues still [...]

Getting the Best Oracle performance on XtremIO


(Blog repost from Virtual Storage Zone – Thanks to @cincystorage) UPDATE: I’ll say it again because there seems to be some confusion: THIS IS A REPOST! Original content is from the Virtual Storage Zone blog (not mine). Just reposted here because it’s interesting and related to Oracle, performance and EMC storage. [...]

Getting the most out of your server resources


As an advocate on database virtualization, I often challenge customers to consider if they are using their resources in an optimal way. And so I usually claim, often in front of a skeptical audience, that physically deployed servers hardly ever reach an average utilization of more than 20 per cent (thereby [...]