> >> Fra: Alex Peshkoff [mailto:peshk...@mail.ru] > >> > >> On 11/13/12 18:18, Poul Dige wrote: > >> > >> > >>> I could put a screen dump here of the Windows 2008R2/63 task manager > >> with AMD Opteron 6274, 2x16 core running FB2.5.1 SC/32 bit (due to > >> some 32 bit UDF). I don't know if you are interested at a gaze. We > >> see exactly the same kind of usage, 8 cores are in use and 24 are more or > less doing nothing. > >>> However, the cores in use are not maxed out - so it COULD be > >>> something > >> with power management that the OS doesn't want to activate more CPU's > >> than necessary. I can't tell about that for sure. > >> Is it SC or CS? > > Hi Alex, > > > > it is Super Classic. > > > > Let me pay your attention that in initially described case use of classic made > all cores loaded. How does your server behave with classic?
Hi Alex, It is a very important production server and I can't find a good way to make tests on it by switching to classic. Thing is, the connections are very short lived, so it is a nice feature that the threads are spawn very quickly by Firebird. I have seen another, similar server (32 cores Win2k8R2) with FB2.1 CS which seems to distribute load evenly, so I guess the problem lies in thread handling - not if FB but in Windows itself. I will try to install an update for Windows as it seems to be a well known problem with Windows 7/2008R2 vs AMD Bulldozer architecture, so the following hotfix may just be a solution (there are two hotfixes, the other one is referred to in the article): http://support.microsoft.com/kb/2646060 I will re-post once we have had opportunity to update the server, which will probably not be until the weekend. Best regards Poul ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
