Available RAM on SunOS 5.10
in [Solaris]
|
Prev: disk space usage
Next: Suggession for your website
From: Roland Titze on 28 May 2010 05:56 On 28 Mai, 09:18, kielhd <kie...(a)freenet.de> wrote: > HI NG, > > I need to find out how nuch RAM is still available on the system. Is > there a command that gives me ONLY the availably RAM (not including > swap-space!) ? > > TIA, > Henning Hi Henning, the command echo "::memstat" | mdb -k gives some information how the physical memory is used. Unfortunately this command is very slow and only usable as user root. BR -- Roland
From: Richard B. Gilbert on 28 May 2010 08:19 Ian Collins wrote: > On 05/28/10 07:18 PM, kielhd wrote: >> HI NG, >> >> I need to find out how nuch RAM is still available on the system. Is >> there a command that gives me ONLY the availably RAM (not including >> swap-space!) ? > > How do you define "available RAM"? > Lacking any further info I'd have to assume he's asking how much RAM is installed. The OP might find this to be of some interest: http://catb.org/~esr/faqs/smart-questions.html A well posed question is more likely to get a useful answer than one to which no thought has been given.
From: Michael Laajanen on 28 May 2010 10:29 Hi, kielhd wrote: >> - prtconf display the physically installed memory > > Thank you for your answer, but I am actually looking for RAM, that is > available for processing, not for the installed RAM. > sysstat [1] is not available on the system, unfortunately. > > Is there another way to get this information? > > TIA, > Henning I think that that is not easy to find out since not all memory is returned until it is needed thats the whole point of having a efficient memory system, not wast CPU cycles until there is a need for it. Is it not enough to know total amount of memory and then use start the app or not. Using other counters like sr(in vmstat 1) will once started tell you if you are in any need of more physical RAM or not. /michael
From: Andrew Gabriel on 28 May 2010 18:26 In article <17753f80-d78b-4fa7-8664-9ad51ee33bc2(a)o1g2000vbe.googlegroups.com>, kielhd <kielhd(a)freenet.de> writes: > >> - prtconf display the physically installed memory > > Thank you for your answer, but I am actually looking for RAM, that is > available for processing, not for the installed RAM. > sysstat [1] is not available on the system, unfortunately. > > Is there another way to get this information? The question is too imprecise to provide any answer. However, I suspect that even if you asked a more precise question, it's still not going to have a simple answer; you really need to go and read up on how system memory allocation works. Thinking that the system keeps memory free for you to use is misleading. A better way to think of it (but still too simplistic) is that the system will find you some memory when you need it, by taking it from other things that need it less than you do. After all, why keep it free - that's just wasting the memory you purchased. As you need more memory, the system will take it from increasingly important other things, and this will eventually start to impact their performance noticably, and eventually the performance of your application and the whole system. It's a sliding scale, and you might not hit any hard limit until the system is performing too poorly to be effective. There are copious resource controls available in Solaris which you can use to impose limits if you need to protect aspects of system performance from such degradation. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup]
From: Canuck57 on 28 May 2010 20:46
On 28/05/2010 2:26 AM, kielhd wrote: > >> - prtconf display the physically installed memory > > Thank you for your answer, but I am actually looking for RAM, that is > available for processing, not for the installed RAM. > sysstat [1] is not available on the system, unfortunately. > > Is there another way to get this information? > > TIA, > Henning Why would you need another way? Isn't going to change the results. -- I would rather be a paid up Conservative nut job than a Liberal with no nuts, no job in debt and living off of other people like a leach. |