On 12/20/11 11:48 AM, James B. Byrne wrote:
we are moving applications from dedicated boxes to kvm based CentOS-6.1 virtual machines on a single CentOS-6.1 host
Database servers often end up with suboptimal performance on virtual IO hardware. This is especially true if they are sharing storage channels and devices with other virtual machines. The 'big boys' (<cough>IBM</cough>) often give a virtual machine running a database server its own storage channel (typically, the HBA for use with a SAN) to get around this. Ditto, they give VM's their own network adapters
Now, if your databases aren't IO performance constrained, this very well may not matter much.
-- john r pierce N 37, W 122 santa cruz ca mid-left coast -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
