Sybase ASE Upgrade Question
Hello fellow forum members, Two questions: Question 1: Ideally we NEED to test v15.7 with our existing custom enterprise application andwould like to install v15.7 in VMWare Vsphere version 5.0/5.1...
View ArticleRe: Sybase ASE Upgrade Question
Hi, You can download a developer edition (that comes with license)...
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Re: In a select clause, what can not be resolved by hashing?
The reasoning I was using to _guess_ that the answer was "HAVING" had to do with the fact that there are LAVA operators for DISTINCT, GROUP BY, and ORDER BY that involve hashing, but HAVING would fall...
View ArticleRe: In a select clause, what can not be resolved by hashing?
I also think it is HAVING, anyway hash join is related mostly to allrows_dss optimization goal and should be used with really big tables (millions of rows) I don't think it provides any advantage with...
View ArticleRe: In a select clause, what can not be resolved by hashing?
Hi Kimon, There are also distinct hashing and group hashing operators (as well as hash union) , so we're looking at more than hash joins. ..however... What you said made me think (along with the...
View Articlemax online engines on Sybase Small Business Edition
Hello, be executing psrinfo command on Solaris machine I see 24 online engines running. Machine has two Intel Xeon X5675 CPUs, every CPU (by specification) has 6 cores with hyper threading. This is...
View ArticleRe: max online engines on Sybase Small Business Edition
Hi Vojislav, What is your setting for "number of engines at startup"? If you run sp_engine "online" does another engine start up, or do you get some error message? If an error message, what is the...
View ArticleRe: max online engines on Sybase Small Business Edition
Hello Bret, number of engines at startup is set to 1. When I try to change this I am getting an info that it can not be set in threaded mode. It also said that I should use "alter thread pool" to...
View ArticleRe: max online engines on Sybase Small Business Edition
Hi, The 'engines at startup' is a legacy process mode cfg parameter, but it is used to decide what the initialnumber of threads should be in syb_default_pool on threaded kernel (which is why Bret said...
View Articleerror while restoring sybase database
Hi Everyone, While restoring database from different SID, got the below error. Am trying to kill the users which are trying to use the database to be restored.Any suggestions please, Below is the...
View ArticleRe: error while restoring sybase database
Hi Prakaash, Have a read of this, it should answer your question. http://scn.sap.com/thread/3287474 HTH, Simon
View ArticleRe: In a select clause, what can not be resolved by hashing?
..one more amendment (these kind of questions niggle at me :-))Even an ansi having clause may be resolved by hashing if indeed the optimizer decides to take care of the having clause before the group...
View ArticleWait event 157 (wait for object to be returned to pool)
Hi, Yesterday evening we had a long running process that generated a ton of 157 wait events (13k events over two hours, totaling over 2500 seconds).I tried to look at the cache statistics via MDA data,...
View ArticleRe: Wait event 157 (wait for object to be returned to pool)
Hi Michael, A bit of a tough one.That wait event can be quite ambiguous (perhaps we should improve it..).It's basically a wait that is registered when are no slots left in an object memory pool.The...
View ArticleRe: Wait event 157 (wait for object to be returned to pool)
Hi Simon, I don't have direct access to the server (not a DBA anymore - but I play one from time to time :-) I've got data collected by Jean-Paul Martin's asemon tool - the wait events from...
View ArticleRe: Wait event 157 (wait for object to be returned to pool)
Hi Michael, As Simon mentioned, did you check sp_monitorconfig to see if any buckets were fully used? Look for configs where Max_Used is equal to Num_free + Num_active, i.e. at some point all of them...
View ArticleRe: From ASE 12.5 2k page size to 15.7 4k page size
Hi Soeren, While it is true that the default page size has changed to 4k, the only way to really tell if you would gain performance by switching from 2k to 4k pages would be to benchmark your system...
View ArticleRe: From ASE 12.5 2k page size to 15.7 4k page size
Hi, Just to follow up on Bret's answer, there is no real scientific reason why the default moved to 4KB pages so you needn't worry that Sybase is saying that is the 'correct' page size, it's entirely...
View ArticleRe: Wait event 157 (wait for object to be returned to pool)
Hi, Yeh, I think we're struggling here with what data you have available, I can't see evidence of what the cause could be really.I will log a feature request though to try to split out the 157 wait...
View ArticleRe: From ASE 12.5 2k page size to 15.7 4k page size
Hi Søren, Based on your other thread, you are running on Linux. The default block size for Linux is 4K. If your system is using the default, then having ASE use 4K will provide a performance boost....
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