Hello Myles, Switch to 1.5.6 Classic, set in firebird.conf DefaultDbCachePages = 512 and you'll see the difference which should be enough.
Regarding migration - look at Profitmed migration case study http://www.slideshare.net/ibsurgeon/firebird-migration-from-firebird-15-to-firebird-25 Regards, Alexey Kovyazin IBsurgeon > I have a new FB 1.5.6 Linux Super Server installation going online. > This will eventually be upgraded to 2.1 or 2.5 but we have legacy code > that keeps us in 1.5.6 for now. > > I have installed a 'default' build of FB 1.5.6 on CentOS 64 bit server, > and its running as a virtual machine on OpenVZ/Proxmox. The > configuration of the server is like this: > > Dell PowerEdge 2950, Dual Xeon 2.6Ghz CPUs (2 core per CPU I believe) > RAID 5, with 3 x 1TB drives, 1 x 1TB Parity, and 1 Hot spare > 16GB of RAM total for server, with 6GB allocated to CentOS for FB Server > 1GB NICs > > The database feeds a web application running on a separate box. > > I have not applied any changes to the default firebird.conf setting. > > The server, under light load (about 8 users), is reporting a higher than > normal CPU load, but almost no RAM load. > > The most intensive queries involve a lot of row retrieval, sorting and > display, and I do not believe I have optimized this for sorting at all. > Nor have I optimized for CPU affinity (which I'm not even sure I can > do with SS 1.5.6 on Linux). I have also not optimized Cache size, and > the DB is reporting page size at 16384. > > So can anyone give me a suggestion as to where to start to get more > performance out of this beast? I know that FB upgrade would help a lot, > but I can't address that in the next few months at least so I have to > work with what I have got right now. I'm seeing that simple queries > appear to be pretty fast, but the more complex ones that are already > highly optimized are loading the server. > > Any thoughts? > > Myles > -- > ----------------------------- > Myles Wakeham > Director of Engineering > Tech Solutions USA LLC > www.techsolusa.com > Phone +1-480-451-7440 > > [Non-text portions of this message have been removed]
