The third party application is locked down and we do not have root access to the server. We have reached out to them for the version number of PostgreSQL. The application server is a virtual machine (RedHat 6) running on VMware 5.5. This is a stand-alone host server running only the third party application. This application is used to monitor just over 5000 network devices (routers, switches, firewalls, servers, etc.). It receives a LOT of information and writes it to disk. The host server has 2 local 15k drives mirrored. The host server is also attached to the SAN via 8GB fiber channel. For testing we did a base installation of Centos 6 and ran a command line test provided by the application vendor. *rm -f /tmp/foo && sync && dd if=/dev/zero of=/tmp/foo bs=4k count=12k oflag=dsync* They said we should be see between 7 and 10 MB/Sec. Writing to the SAN we get around 1.7 MB/Sec. Writing to the local drives we get around 11.3 MB/Sec. Just a note: We have a 4 host server cluster of VMware servers running off the SAN. There are multiple MSSQL servers running in this cluster as well as web servers, etc. etc. About 45 servers in all. We have zero performance issues with any of these. Thoughts? Thanks again!! Terry -- View this message in context: http://postgresql.nabble.com/Disk-I-O-Question-tp5873364p5873398.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
