> On Thu, 15 Jul 1999 11:09:01 -0700 (PDT),
Matthew Dillon said:
> Umm... how are you getting the reserved numbers?
"pstat -s" on SunOS4, and "swap -s" on SunOS5. From Solaris man page:
:-s Print summary information about total swap
: space
> On Thu, 15 Jul 1999, Daniel C. Sobral wrote:
>> Uh... like any modern unix, Solaris overcommits.
> On Thu, 15 Jul 1999 08:46:36 -0700 (PDT),
"Eduardo E. Horvath" said:
> Where do you guys get this misinformation?
:
> Note the `19464k reserved'; that space has been reserve
> On Thu, 15 Jul 1999 11:09:01 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> Umm... how are you getting the reserved numbers?
"pstat -s" on SunOS4, and "swap -s" on SunOS5. From Solaris man page:
:-s Print summary information about total swap
:
> On Thu, 15 Jul 1999, Daniel C. Sobral wrote:
>> Uh... like any modern unix, Solaris overcommits.
> On Thu, 15 Jul 1999 08:46:36 -0700 (PDT),
"Eduardo E. Horvath" <[EMAIL PROTECTED]> said:
> Where do you guys get this misinformation?
:
> Note the `19464k reserved'; that sp
> On Tue, 13 Jul 1999 17:53:10 -0700 (PDT),
Matthew Dillon said:
> You keep on saying that users can run the system out of swap
> easily, and I've tried to point out to you that it isn't quite
> as easy as you believe (and I've used a real-life example to
> show my poi
> On Tue, 13 Jul 1999 17:25:21 -0700 (PDT),
Matthew Dillon said:
> With today's modern high capacity disk drives, a properly configured
> multi-user system will have enough swap that running it out is difficult
> to say the least.
That's wrong.
Please remember that you sa
> On Tue, 13 Jul 1999 17:53:10 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> You keep on saying that users can run the system out of swap
> easily, and I've tried to point out to you that it isn't quite
> as easy as you believe (and I've used a real-life example
> On Tue, 13 Jul 1999 15:53:43 -0700 (PDT),
Matthew Dillon said:
> ... a situation which will never occur if you are managing the memory
> through your own custom library. Therefore not relevant.
Hm. It's misunderstanding.
I don't agree with you about the following point.
T
> On Tue, 13 Jul 1999 17:25:21 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> With today's modern high capacity disk drives, a properly configured
> multi-user system will have enough swap that running it out is difficult
> to say the least.
That's wrong.
Please
> On Tue, 13 Jul 1999 15:53:43 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> ... a situation which will never occur if you are managing the memory
> through your own custom library. Therefore not relevant.
Hm. It's misunderstanding.
I don't agree with you about th
> On Tue, 13 Jul 1999 15:29:37 -0700 (PDT),
Matthew Dillon said:
> In the same manner any truely critical system server must handle the
> resource management itself to deal with all sorts of problem situations,
> including memory. You do not need to build any of this cont
> On Tue, 13 Jul 1999 14:53:43 -0700 (PDT),
Matthew Dillon said:
> If you are talking about a user intentionally attempting to run
> a system out of swap, it is fairly easy to do whether the system
> uses an overcommit model or not. The user has any number of
> ways o
> On Tue, 13 Jul 1999 15:29:37 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> In the same manner any truely critical system server must handle the
> resource management itself to deal with all sorts of problem situations,
> including memory. You do not need to bu
> On Tue, 13 Jul 1999 14:27:54 -0700 (PDT),
Matthew Dillon said:
> > That's wrong.
> > On such systems, critical server has a chance to save it's data to
> > filesystem.
> > On 4.4BSD derived systems, it cannot be guaranteed.
> You are assuming that the situation actually occurs.
> On Tue, 13 Jul 1999 14:16:54 -0700 (PDT),
Matthew Dillon said:
> > Unlike 4.4BSD derived VM, Solaris VM has a way to reserve backing store.
> Secondly, for such a server to fail to run is just as bad as if
> the system were to run out of swap.
> IRIX has a swap reserva
> On Tue, 13 Jul 1999 14:53:43 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> If you are talking about a user intentionally attempting to run
> a system out of swap, it is fairly easy to do whether the system
> uses an overcommit model or not. The user has any nu
> On Tue, 13 Jul 1999 11:13:49 -0700 (PDT),
Matthew Dillon said:
> Doh! Even solaris doesn't overcommit - you think it actually
> reserves data blocks for its file-backed swap? Bzzt! It uses
> an overcommit model too.
Unlike 4.4BSD derived VM, Solaris VM has a way to r
> On Tue, 13 Jul 1999 14:27:54 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> > That's wrong.
> > On such systems, critical server has a chance to save it's data to
> > filesystem.
> > On 4.4BSD derived systems, it cannot be guaranteed.
> You are assuming that the situat
> On Tue, 13 Jul 1999 14:16:54 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> > Unlike 4.4BSD derived VM, Solaris VM has a way to reserve backing store.
> Secondly, for such a server to fail to run is just as bad as if
> the system were to run out of swap.
> IRI
> On Tue, 13 Jul 1999 11:13:49 -0700 (PDT),
Matthew Dillon <[EMAIL PROTECTED]> said:
> Doh! Even solaris doesn't overcommit - you think it actually
> reserves data blocks for its file-backed swap? Bzzt! It uses
> an overcommit model too.
Unlike 4.4BSD derived VM, Solar
> On Tue, 13 Jul 1999 10:11:14 -0400 (EDT),
"Brian F. Feldman" said:
>> > you also have to consider a program wishing to make sparse use
>> > of its address space, without overcommit it becomes impossible.
>>
>> SVR4 has MAP_NORESERVE option for mmap(2) for this.
>> So, default behai
> On Tue, 13 Jul 1999 10:11:14 -0400 (EDT),
"Brian F. Feldman" <[EMAIL PROTECTED]> said:
>> > you also have to consider a program wishing to make sparse use
>> > of its address space, without overcommit it becomes impossible.
>>
>> SVR4 has MAP_NORESERVE option for mmap(2) for this.
> You're browsing with netscape and It hits about 32megs in size,
> you click on a multimedia object and netscape execs a helper app.
If the system has real vfork(2) like NetBSD, this is not problem.
> you also have to consider a program wishing to make sparse use
> of its address space, without
> You're browsing with netscape and It hits about 32megs in size,
> you click on a multimedia object and netscape execs a helper app.
If the system has real vfork(2) like NetBSD, this is not problem.
> you also have to consider a program wishing to make sparse use
> of its address space, without
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