InstantForum.NET v2.9.0SQLServerCentralhttp://www.sqlservercentral.com/Forums/notifications@sqlservercentral.comTue, 21 May 2013 20:22:42 GMT20http://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspx[quote][b]Gazareth (1/11/2012)[/b][hr][quote][b]a.borgeld (1/11/2012)[/b][hr]An other instance can use a different CPU and threads. But your right, it really depends on the hardware. Thanks for your advice guys.Kind regards,André[/quote]Hmm, think I'd create another VM and install SQL there before I started playing with Processor affinity :-D[/quote]Yeah i think your right in that, most research will cost you much more time. And like the first response said, your overview will be better.Wed, 11 Jan 2012 10:17:53 GMTa.borgeldhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspx[quote][b]a.borgeld (1/11/2012)[/b][hr]An other instance can use a different CPU and threads. But your right, it really depends on the hardware. Thanks for your advice guys.Kind regards,André[/quote]Hmm, think I'd create another VM and install SQL there before I started playing with Processor affinity :-DWed, 11 Jan 2012 10:12:15 GMTGazarethhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxAn other instance can use a different CPU and threads. But your right, it really depends on the hardware. Thanks for your advice guys.Kind regards,AndréWed, 11 Jan 2012 10:01:15 GMTa.borgeldhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxMy office has servers that don't match what you are describing and have 40+ databases on them with little to no performance problems. It really comes down to users & transactions. If you have 1 database with a huge number of users, and transactions, then it could chew up all of the hardware. If however you have 100+ databases where they are only used by 1 or 2 people each, with a very low number of transactions each, then it will certainly work.I would recommend putting your 10 databases on the server (more if you feel comfortable) and see how your performance stands. If you feel like there is more room, then add another database. If at any point you start seeing pressure somewhere that you can't resolve then you might want to call it good enough, or even pull one of the databases back off the instance.Also you should note that it won't help to add an additional instance on the same server. They are both going to be pulling from the same hardware so it would actually decrease performance since the instance itself has its own overhead.We have a few servers where we have put multiple instances on the same server, but we did so for organizational and security reasons. IE we have a DEV and WEBDEV instance on the same server. DEV is for our non web application databases and WEBDEV is for our web application databases.As with most things SQL Server, it depends. So good luck :-DKennethWed, 11 Jan 2012 09:19:13 GMTKenneth.Fisherhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspx[quote][b]a.borgeld (1/10/2012)[/b][hr]Specs:VM-wareDual core8 gig memory64 bit hard and software (Windows 2008 R2 + SQL server 2008 R2)How many databases can i run on a single instance?[/quote]Answer is, it depends :-1) Size of database2) Transaction Volume of Database3) How frequently your database are being refreshed with maintenance plan4) Number of users connecting.And on light note, you can have more than 4 database. As you cant limit sql to not create system databases(without replication).Tue, 10 Jan 2012 23:55:30 GMTcrazy4sqlhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspx15 gig, but there are databases from 1 gig too. Average 7 gig. Some are for the restservice some for the Internetapplication.I've seen it too. But ofcourse you need to be carefull you don't lose sight and in 32bit i've seen performance degradation with more then 10.Tue, 10 Jan 2012 23:33:59 GMTa.borgeldhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxHow big are these databases and what kind of work(type and load) do they have?I've seen way more than 10 per instance in production on 32 and 64 bit machines.Tue, 10 Jan 2012 09:44:01 GMTbenjamin.reyeshttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxthat figure you remember of 10 databases on a 32bit server sounds like how many databases you can MIRROR on one server. Even that is not a hard and fast figure, it all comes down to how much load the databases impose on the server.64bit would be able to mirror more, but load is still the delimiting factorTue, 10 Jan 2012 06:51:40 GMTgeorge sibbaldhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxThanks for the feedback Cadavre, i had read it somewhere and i wanted to be sure.And ofcourse the oposite is add much more hardware. But dividing into more instances in a normal configuration would be better.Kind regards,AndréTue, 10 Jan 2012 05:03:39 GMTa.borgeldhttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxI don't think there's a baked answer to this question."As many as your hardware can handle" would be quite close.If your server has adequate memory, CPU and disk to serve 100 databases, go ahead. Be aware that mixing workloads from different applications makes monitoring and tuning a bit complicated. Resource Governor helps, but doesn't take away all the pain.Hope this helpsGianlucaTue, 10 Jan 2012 04:54:38 GMTspaghettidbahttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxTheoretically, you could have 32,767 databases per instance. Good luck with that. . . Personally, I find it difficult to keep track of more than 10.Tue, 10 Jan 2012 03:55:05 GMTCadavrehttp://www.sqlservercentral.com/Forums/Topic1233023-1550-1.aspxSpecs:VM-wareDual core8 gig memory64 bit hard and software (Windows 2008 R2 + SQL server 2008 R2)How many databases can i run on a single instance?I read about max on 32 bit, use not more then 10 database, but is there a max on 64 bit servers?I thaught i heard about 32 databases and then you have to make another instance. Is that the case?Tue, 10 Jan 2012 03:44:25 GMTa.borgeld