Optimising Postgres performance in Linux VMs

Question

What is the optimal deployment for high-performance Postgres databases on an Ubuntu Linux VM - beyond standard A-series and D-series basic configurations?
This will be useful to many of our research users particularly.
Thanks,
 Kenji Takeda (Microsoft Research)
Kenji Microsoft Research Connections http://research.microsoft.com/collaboration/

Answer 1

Hi,
On these new D-series sizes, the temporary drive (/mnt or
/mnt/resource on Linux) are local SSDs. This high-speed local disk is best used for workloads that replicate across multiple instances, like MongoDB, or can leverage this high I/O disk for a local and temporary
cache. (Note, these drives are not guaranteed to be persistent. Thus, while physical hardware failure is rare, when it occurs, the data on this disk may be lost, unlike your OS disk and any attached durable disks that are persisted in Azure Storage.) The D-series sizes
offer an optimal configuration for running workloads that require increased processing power and faster local disk I/O than A-series sizes.
In addition, you can group two or more virtual machines in an Availability Set to provide redundancy as it ensures that during either a planned or unplanned maintenance event, at least one virtual machine will be available and meet the 99.95% Azure
SLA.
Best regards,
Susie
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