Hi Karol, what Windows 2008 memory problem are You refering to that needs 2.5.3?
Thanks Zsazsi 2014-05-13 7:23 GMT+02:00 'liviusliv...@poczta.onet.pl' liviusliv...@poczta.onet.pl [firebird-support] < firebird-support@yahoogroups.com>: > > > Hi, > > Your database is not big but your settings are low. Change your FB server > to 64bit and increase your dbbuffer or in fbconfig defaultdbcasche setting > and use superserver. Check your database data page size. I always set it to > 16KB. Your database utylize memory in this pattern: > > Dbpage size * dbbuffers > Or if dbbuffer is 0 > Db page size * defaultdbcachepages > > You must add to this sort buffer for any connection. > > You should also download shnapshot of firebird 2.5.3.xxx to fix windows > 2008 memory problem > > Regards, > Karol Bieniasxewski > > Wysłane z mojego HTC > > > ----- Reply message ----- > Od: "Joshua Hartmann jhartm...@computekdental.com [firebird-support]" < > firebird-support@yahoogroups.com> > Do: <firebird-support@yahoogroups.com> > Temat: [firebird-support] Cache Performance Options > Data: pon., maj 12, 2014 21:32 > > > > > I am a MSP for a large dental office that uses an application with a > Firebird DB. I've done a lot of database work in my life, but none with > firebird so I need a little help with the configurations. The office is > complaining of slowness and what we've done so far to help them will be > below. Keep in mind, I am not the developer of the application, just a MSP > trying to help them out since the developer has no clue what they're doing. > > The server is QEMU/KVM virtual server running Microsoft Server 2008 R2. > The host machine is running Ubuntu Server 12.04. > Xeon 1275 > 4 cores allocated to the virtual server > 12GB memory allocated to the virtual server (32GB total on the host > machine) > 750GB Momentus Hybrid SSD/HDD's (RAID 0+1 1.5TB total usable) > > The database is ~30GB > > At first, they were running in classic server mode (FB version 2.1.3 x86) > on a physical server 2003 machine with 4GB of memory. That machine's HDD's > started to fail so we just moved it to the new virtual 2008 server. > > We let the software company do the install and they set it to classic mode > (version 2.1.3 x86) but left all options at default. We noticed the server > would start pretty fast but then throughout the day slow down. When > checking the system's resources, I noticed it was maxing out on RAM and > moving to the page file which explained the slowness. However, task manager > did not display that memory was actually being used by the fbserver.exe > processes. > > I asked the developer to switch it to superserver because I read its > better for shared cache and since all the clients are accessing the same > data (appointment lists, patient lists, etc) I thought it would speed > things up. It didn't change the memory usage and fbserver.exe still only > reported using about 60MB. > > So I started reading through articles online and found a bunch of > optimization and cache settings. I changed the database options for async, > set page buffers at 60k, and turned off auto sweeping. I also changed the > firebird.conf settings. Specifically, the MaxFileSystemCache. None of it > made any difference. > > Next, I upgraded to 2.5.2 (still x86) and its made a little difference. I > still notice the fbserver using quite a bit of disk IO though and its still > not very fast. > > I guess my questions are: > In my situation, should I be using all file system cache or firebird > cache? Essentially, what should I set my page buffers and > FileSystemCacheThreshole to? I've already set my FileSystemCache to 90%. > Should I enable or disable async? > Should I enable auto sweeping or not? > Would performance be faster if we upgraded to the 64bit version of 2.5.2? > > Thanks for any advice you can give. > > -Josh > > > > >
