Just quickly: > I got a few questions; > > 1.) Is the 'priocntl' utility used instead of the > 'nice' utility, or is it just another priority tool? > I got the feeling it's the same as 'nice'.... Already well answered by others.
> 2.) Is Dynamic System Domains the same as zones? The > description of it feels like it's _almost_ the > same, but more hardware oriented division. (Link for > DSD information?) You'll find DSD documented somewhere under http://docs.sun.com/ try searching for Dynamic System Domains. They are hardware-specific, if you don't have ~SF4000-E25K you won't have the facility. Sorry, no time to expand on this just now. > 3.) What's the actual difference between changing > user priority and global priority? What happends if I > change both to maximum (say RT). Is the user priority > less worth the global? If I as root change the user > priority, is there any point in changing the global > priority of the process/project? Unless the process is specifically designed for realtime operation pick something else besides RT -- perhaps FX at high priority (keep process priority less than kernel). > 4.) If I set a process/project to have a certain > limit of memory allocation, could this have positive > effects on applications with memory leaks? If the > memory leaks cannot pass say 50Mb of memory, can > these 50Mb be allocated with non-usable memory > (memory leaks) so the actual memory usage gets even > worse for the application? > And if I have have 4Gb of memory, and I set a limit > of 3.5Gb to one application that at a certain point > only use 2Gb of the memory and another application > uses 2Gb. Then suddenly the first application (the > one with 3.5Gb limit) uses its full limit (3.5Gb), > what happends with the memory that the second > application had allocated (1.5Gb)? Does this memory > get swapped to the HDD and the second application > only get access to the 500Mb memory thats left? The 3.5 GB limit should stop application 1 from consuming all available memory, thus limiting how much it can steal from application 2. Mind you, on a 4 GB system 3.5 GB is not much of a "limit", it could still use most of it! The two will still compete, least-recently-used pages will get paged out. If app 2 is more active (in terms of touching lots of pages quickly) it could end up paging out half of app 1, given app 2 has no limit imposed -- however if it never uses more than 2 GB this might not matter...it depends! > I hope you understand my questions even if they got a > bit sloppy :) > > Best Regards, > Nergal Hope this helps, rgds, Stuart. This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list [email protected]
