On Sun, 26 May 2013 18:48:18 -0500
Adam Vande More wrote:
> Um, that is wrong. It is in fact the basically the point of TRIM.
> And SSD's typically use the best form of wear leveling and it's
> usually advisable to leave a bit of the drive unpartitioned/unused to
> ensure the wear leveling works
RW googlemail.com> writes:
>
> On Sun, 26 May 2013 12:36:42 + (UTC)
> jb wrote:
>
> > But, swapping is also a symptom, not a problem.
> > It is never a good idea to let it get to that point.
>
> No, there are thing that are better on disk than in memory. The most
> common example is tmpfs.
RW googlemail.com> writes:
> ...
> > Yes, there is some confusion about the diff, if any, between paging
> > and swapping.
> >
> > Paging - copying or moving pages between physical memory (RAM) and
> > secondary storage (e.g. hard disk), in both directions.
> > Swapping - nowdays is synonymous
On Wed, 29 May 2013 19:52:02 + (UTC)
jb wrote:
> RW googlemail.com> writes:
>
> >
> > BTW you mean paging, or swap use, rather that swapping. Linux
> > supports only paging, so it can be taken as read that swapping
> > means paging, but FreeBSD supports both.
>
> Yes, there is some confus
On May 29, 2013, at 3:52 PM, jb wrote:
> Yes, there is some confusion about the diff, if any, between paging and
> swapping.
>
> Paging - copying or moving pages between physical memory (RAM) and secondary
> storage (e.g. hard disk), in both directions.
> Swapping - nowdays is synonymous with
On Wed, May 29, 2013 at 2:52 PM, jb wrote:
> Well, Linux utilizes swap space as part of virtual memory.
As does every other Unix.
--
Adam Vande More
___
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-que
RW googlemail.com> writes:
>
> On Sun, 26 May 2013 12:36:42 + (UTC)
> jb wrote:
>
> > But, swapping is also a symptom, not a problem.
> > It is never a good idea to let it get to that point.
>
> No, there are thing that are better on disk than in memory. The most
> common example is tmpfs.
PS -- Moderating questions@ is just awful. I'm disappointed.
On Wed, May 29, 2013 at 1:34 PM, Adam Vande More wrote:
> On Wed, May 29, 2013 at 1:05 PM, Warren Block wrote:
>> And you don't think the presence of TRIM--where the SSD can actually know
>> which blocks are no longer in use--is worth
On Wed, May 29, 2013 at 1:05 PM, Warren Block wrote:
> And you don't think the presence of TRIM--where the SSD can actually know
> which blocks are no longer in use--is worthwhile?
As a whole, TRIM is worthwhile. However when an SSD is
overprovisioned it provides a lot of benefits. TRIM-less sw
On Wed, 29 May 2013, Michael Sierchio wrote:
On Sun, May 26, 2013 at 6:17 PM, Adam Vande More wrote:
Normal dynamic wear leveling on a modern SSD will be better than
imposing an FS- backed swap for 4GB partion occupying a small fraction
of total drive space.
And you don't think the presence
On Sun, May 26, 2013 at 6:17 PM, Adam Vande More wrote:
>
> Normal dynamic wear leveling on a modern SSD will be better than
> imposing an FS- backed swap for 4GB partion occupying a small fraction
> of total drive space.
>
>
Quite so.
- M
___
freebsd-
On Wed, May 29, 2013 at 6:19 AM, jb wrote:
> - overcommitment of memory (a bluff asking to be punished by OOM killer)
No self respecting Unix has an OOM by default.
> - OOM killer
Are you suggesting FreeBSD does this crap?
> Besides, they allow sloppy/dangerous programming.
Yup, in the kernel
On Wed, 29 May 2013 13:57:22 +0200
Fred Morcos wrote:
> Linux has a sysctl variable vm.swappiness which you can set to 0 or 1
> out of 100. Not sure how to achieve the same on FreeBSD, maybe one or
> more combinations of the following?
You'll probably make things worse.
> vm.stats.vm.v_swappgso
On Sun, 26 May 2013 12:36:42 + (UTC)
jb wrote:
> But, swapping is also a symptom, not a problem.
> It is never a good idea to let it get to that point.
No, there are thing that are better on disk than in memory. The most
common example is tmpfs. It's much better that files left on tmpfs can
On Wed, May 29, 2013 at 1:19 PM, jb wrote:
> Fred Morcos gmail.com> writes:
>
> > ..
> > The improvement effect can be
> > noticed on large inputs. These algorithms will most probably perform
> quite
> > badly on small inputs.
>
> I think your concern has been addressed in review of various algo
Fred Morcos gmail.com> writes:
> ..
> The improvement effect can be
> noticed on large inputs. These algorithms will most probably perform quite
> badly on small inputs.
I think your concern has been addressed in review of various algos where base
case identification helped to avoid overhead co
On 26. mai 2013, at 10:58, "M. V." wrote:
> But recently I heard from a FreeBSD expert that I shouldn't have swap
> partition for my server, and having swap partition could make my server
> unstable
Any chance this could be a simple misunderstanding?
That he object
On Tue, May 28, 2013 at 8:42 PM, jb wrote:
> Follow up comment.
>
> It has been pointed out to me that there is Varnish software taking
> advantage
> of system VMM and swap space.
>
> Well, there are cache-oblivious algorithms that perform as well, and so
> they
> make the above (disk access mode
Follow up comment.
It has been pointed out to me that there is Varnish software taking advantage
of system VMM and swap space.
Well, there are cache-oblivious algorithms that perform as well, and so they
make the above (disk access model; cache-aware model) unnecessary
(obsolete ?) and are super
jb gmail.com> writes:
> M. V. yahoo.com> writes:
>> recently I heard from a FreeBSD expert that I shouldn't have
>> swap partition for my server, and having swap partition could
>> make my server unstable.
> I think your FB expert was up to something.
random writes. A lot of common swap usage
isn't random. All this is of course assuming we're dealing with a
quality drive. If you're using a cheap Chinese knock off, all bets
are off.
> A FreeBSD swap partition has no way to use TRIM, so I suggest
> using a swap file on top
.
Um, that is wrong.
Which part? A FreeBSD swap partition has no way to use TRIM, so I
suggest using a swap file on top of UFS, which does support TRIM.
It is in fact the basically the point of TRIM.
And SSD's typically use the best form of wear leveling and it's
usually advisable
On Sun, May 26, 2013 at 6:32 PM, Warren Block wrote:
> Another problem with SSDs is that they can have difficulty with wear
> leveling. This is even worse with swap because there is no way to use TRIM
> to tell the SSD about blocks that have been freed.
Um, that is wrong. It is in fact the bas
, /usr and swap) for a
long time now. But recently I heard from a FreeBSD expert that I
shouldn't have swap partition for my server, and having swap
partition could make my server unstable. this was so strange for me,
and I searched a lot but couldn't find a reason for this claim.
becau
PDT)
>>> "M. V." wrote:
>>>
>>> I have a 24/7 network server/gateway with FreeBSD-8.2 on a SSD drive.
>>>> it's partitioned as normal (/ , /tmp, /var , /usr and swap) for a
>>>> long time now. But recently I heard from a FreeBSD expert th
M. V. yahoo.com> writes:
>
> hi everyone,
>
> I have a 24/7 network server/gateway with FreeBSD-8.2 on a SSD drive. it's
partitioned as normal (/ , /tmp,
> /var , /usr and swap) for a long time now. But recently I heard from a
FreeBSD expert that I shouldn't have
&g
On 26/05/2013 09:58, M. V. wrote:
> hi everyone,
>
> I have a 24/7 network server/gateway with FreeBSD-8.2 on a SSD drive. it's
> partitioned as normal (/ , /tmp, /var , /usr and swap) for a long time now.
> But recently I heard from a FreeBSD expert that I shouldn't h
gt; drive. it's partitioned as normal (/ , /tmp, /var , /usr and swap)
> > for a long time now. But recently I heard from a FreeBSD expert
> > that I shouldn't have swap partition for my server, and having swap
> > partition could make my server unstable. this was so strang
reeBSD expert that I shouldn't have swap
> partition for my server, and having swap partition could make my server
> unstable. this was so strange for me, and I searched a lot but couldn't find
> a reason for this claim.
>
>
> so my question is simple:
> - could ha
usr and swap) for a
> > long time now. But recently I heard from a FreeBSD expert that I
> > shouldn't have swap partition for my server, and having swap
> > partition could make my server unstable. this was so strange for me,
> > and I searched a lot but couldn'
I
> shouldn't have swap partition for my server, and having swap
> partition could make my server unstable. this was so strange for me,
> and I searched a lot but couldn't find a reason for this claim.
>
because it is a false claim. I never ever have had any system with
working
hi everyone,
I have a 24/7 network server/gateway with FreeBSD-8.2 on a SSD drive. it's
partitioned as normal (/ , /tmp, /var , /usr and swap) for a long time now. But
recently I heard from a FreeBSD expert that I shouldn't have swap partition for
my server, and having swap parti
Jerry McAllister writes:
> This could be a problem. I think using the '*' for size will
> cause it to use the whole remaining space for that partition.
> Even though it logically starts at 2097152, it might not come out
> even on a good boundary or something like that. It really seems to
> like
On Tue, Feb 02, 2010 at 11:28:13AM -0600, Martin McCormick wrote:
> I figured out a way to install swap as the only
> fixed-sized partition such that whatever is left is marked as
> BSD (165) but I am not sure if this is a workable solution so I
> am asking for suggestions.
>
> If I s
I figured out a way to install swap as the only
fixed-sized partition such that whatever is left is marked as
BSD (165) but I am not sure if this is a workable solution so I
am asking for suggestions.
If I set up the disk label reference file as follows:
# /dev/ad0s1:
8 partitions
x27;t do.
ad0s1-1=ufs 77116032 / 1
ad0s1-2=swap 0
or should it be ad0s1a and ad0s1b?
When using ad0s1a and ad0s1b, there are no error
messages, but it also didn't create the swap partition. Thank you.
Martin McCormick
___
freebsd
Here is the output of fdisk from the drive to be formatted.
*** Working on device /dev/ad0 ***
parameters extracted from in-core disklabel are:
cylinders=77504 heads=16 sectors/track=63 (1008 blks/cyl)
Let's try a million or so blocks left as swap.
ad0s1-1=ufs 77116032 / 1
#That
Bob Johnson writes:
> The only thing that looks out of place is that you have defined
> ad0s1-2 before ad0s1-1. I've never tested it, but perhaps this is
> causing it to get confused when calculating the disk layout? In other
> words, perhaps you should use
>
> #1G swap followed by / on rest of di
97152
#All the rest is FreeBSD with soft updates.
ad0s1-2=ufs 0 / 1
so they are defined in numerical sequence.
On 1/27/10, Martin McCormick wrote:
> Our FreeBSD systems mostly have a very simple disk layout. There
> is a 1 or 2-gigabyte swap partition and all the rest is FreeBSD.
>
Our FreeBSD systems mostly have a very simple disk layout. There
is a 1 or 2-gigabyte swap partition and all the rest is FreeBSD.
When manually configuring these partitions in sysinstall, I
usually set up swap first with a 1GB size and then use the
remaining space by selecting the values as
Jerry McAllister writes:
> But, note that you are talking only a small percentage
> of your Hd space, so it is hardly worth quibbling about.
In most places, disk space is dirt cheap. If you're really
worried, find a 5-10 gbyte drive used and make it a dedicated swap
disk.
On Wed, Jan 02, 2008 at 05:13:28PM -0800, Eugen Udma wrote:
> Hello,
>
> I have FreeBSD installed on my desktop, with 2 GB of RAM and
> 4 GB swap partition and this swap partition is very seldom
> touched by the system and then only 2-3% used.
>
> I want to install FreeBSD
Eugen Udma wrote:
Hello,
I have FreeBSD installed on my desktop, with 2 GB of RAM and
4 GB swap partition and this swap partition is very seldom
touched by the system and then only 2-3% used.
I want to install FreeBSD on a laptop with 4 GB of RAM and a
hard disk of 100 GB. Should I
On Wed, 2 Jan 2008 17:13:28 -0800 (PST)
Eugen Udma <[EMAIL PROTECTED]> wrote:
> I want to install FreeBSD on a laptop with 4 GB of RAM and a
> hard disk of 100 GB. Should I waste 8 GB for a swap partition,
> as it is recommended in the handbook?
Probably not. The twice the ram rul
Hello,
I have FreeBSD installed on my desktop, with 2 GB of RAM and
4 GB swap partition and this swap partition is very seldom
touched by the system and then only 2-3% used.
I want to install FreeBSD on a laptop with 4 GB of RAM and a
hard disk of 100 GB. Should I waste 8 GB for a swap
On Thu, 25 Oct 2007 01:39:20 +0100
Bruce Cran <[EMAIL PROTECTED]> wrote:
> RW wrote:
> > I have two swap partitions, ad4s1b is part of my main slice, and
> > ad6s1b is on a second drive. The permissions are the same, but I
> > can't overwrite the second one. The same thing happens whether I
> > us
RW wrote:
I have two swap partitions, ad4s1b is part of my main slice, and ad6s1b
is on a second drive. The permissions are the same, but I can't
overwrite the second one. The same thing happens whether I use swapoff
or reboot into single user mode.
What's the difference?
# dd if=/dev/random of
I have two swap partitions, ad4s1b is part of my main slice, and ad6s1b
is on a second drive. The permissions are the same, but I can't
overwrite the second one. The same thing happens whether I use swapoff
or reboot into single user mode.
What's the difference?
# dd if=/dev/random of=/dev/ad4s1b
ED]>
> To: Aloha Guy <[EMAIL PROTECTED]>
> Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Sent: Sunday, February 4, 2007 2:28:47 PM
> Subject: Re: swap file vs swap partition
>
>
> Aloha Guy wrote:
> > Thanks for the input. You do have good points. The only issue w
Please wrap your lines and don't top-post.
On Sun, 2007-Feb-04 15:24:39 -0800, Aloha Guy wrote: What I actually
>meant was, I know in the old days, if you had 128MB, you want a 256MB
>swap but with 2GB RAM, isn't 4GB going to be overkill for a swap or
>are you saying that a 2GB swap will work? I'
On Sun, February 4, 2007 3:53 pm, Aloha Guy wrote:
> Thanks for the input. You do have good points. The only issue with
> swap partitions is that it seems like you need to increase it
> everytime you increase the physical memory. Is there a swap partition
> size limit that pret
On Monday 05 February 2007 08:58, Scott Long wrote:
> Processors and memory have vastly outpaced the speed of disks; any
> amount of swapping is going to be percieved as being very slow and
> something that should be avoided. Since RAM is also very cheap now,
> most people just load enough RAM int
nts of RAM.
John
- Original Message
From: Scott Long <[EMAIL PROTECTED]>
To: Aloha Guy <[EMAIL PROTECTED]>
Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Sunday, February 4, 2007 2:28:47 PM
Subject: Re: swap file vs swap partition
Aloha Guy wrote:
> Thanks for the input.
Aloha Guy wrote:
Thanks for the input. You do have good points. The only issue with
swap partitions is that it seems like you need to increase it everytime
you increase the physical memory. Is there a swap partition size limit
that pretty much will handle anything and setting a number
Thanks for the input. You do have good points. The only issue with swap
partitions is that it seems like you need to increase it everytime you increase
the physical memory. Is there a swap partition size limit that pretty much
will handle anything and setting a number larger than that will
Aloha Guy wrote:
Greetings everyone:
I am planning to build a few new boxes which will run -RELEASE and -CURRENT and
I have a question about the swap file. In the past, I had always used a swap
partition of 256MB since I originally had 128MB system memory in the 1990's but
my syste
Greetings everyone:
I am planning to build a few new boxes which will run -RELEASE and -CURRENT and
I have a question about the swap file. In the past, I had always used a swap
partition of 256MB since I originally had 128MB system memory in the 1990's but
my system has been upgraded t
=?windows-1252?Q?Bj=F6rn_K=F6nig?= <[EMAIL PROTECTED]> writes:
> Kiffin Gish schrieb:
> > I just upgraded my laptop from 512MB to 1024MB memory.
> > It is said that the /swap partition has to be at least as much as
> > the maximum available memory, [...]
>
> This
Kiffin Gish schrieb:
I just upgraded my laptop from 512MB to 1024MB memory.
It is said that the /swap partition has to be at least as much as the maximum
available memory, [...]
This is more an ancient rule of thumb. You can even have a working
system without swap at all. Swap will be only
I just upgraded my laptop from 512MB to 1024MB memory.
It is said that the /swap partition has to be at least as much as the maximum
available memory, but my current value is still based on the old 512MB size.
Can I increase the size of the existing swap partition or do I have to create a
new
p the whole of the
drive. Can I shrink the mirror partition and have two swap partitions,
or if that is not possible, how would I go about creating a "mirrored"
swap partition?
Your swap partition ought to be mirrored already. From a similar system:
0-11:01 [EMAIL PROTECTED] ~&g
Can I shrink the mirror partition and have two swap partitions,
or if that is not possible, how would I go about creating a "mirrored"
swap partition?
# bsdlabel /dev/mirror/gm0s1
# /dev/mirror/gm0s1:
8 partitions:
#size offsetfstype [fsize bsize bps/cpg]
a:
From: Kris Kennaway <[EMAIL PROTECTED]>
To: Supote Leelasupphakorn <[EMAIL PROTECTED]>
CC: [EMAIL PROTECTED], freebsd-questions@freebsd.org
Subject: Re: what's wrong with my swap partition ?
Date: Thu, 27 Jan 2005 19:44:53 -0800
MIME-Version: 1.0
Received: from obsecurity.dyndns.o
On Fri, Jan 28, 2005 at 10:27:42AM +0700, Supote Leelasupphakorn wrote:
> Hi list,
>
> If so, what do I do next coz there is no command "swapoff"
> in such box. It's 4.10-RELEASE. But I'm pretty sure that I've
> never run command "swapon" maually or I miss something.
Does it persist after reboo
PROTECTED]>
To: Supote Leelasupphakorn <[EMAIL PROTECTED]>
CC: freebsd-questions@freebsd.org
Subject: Re: what's wrong with my swap partition ?
Date: Thu, 27 Jan 2005 11:21:22 -0800
MIME-Version: 1.0
Received: from MC6-F35.hotmail.com ([65.54.252.171]) by imc1-s34.hotmail.com
with Mic
On Thu, Jan 27, 2005 at 05:23:38PM +0700, Supote Leelasupphakorn wrote:
> Hi list,
>
> I owned 2 boxes of FreeBSD 4.x and just noticed that the output
> of command "swapinfo" are strange coz there are two lines of swap
> entry like below. What's wrong with my 2nd boxes and how do I do
> with thi
Hi list,
I owned 2 boxes of FreeBSD 4.x and just noticed that the output
of command "swapinfo" are strange coz there are two lines of swap
entry like below. What's wrong with my 2nd boxes and how do I do
with this ?
--- snip from the 1st box ---
Device 1K-blocks UsedAvail Capacit
Simon Burke wrote:
After a while of using 5.3RELEASE, i have noticed a small problem, my
swap partition isnt getting used. Well its not a small problem
considering that i have only 256mb ram on this machine.
boredom# swapctl -l
Device: 1024-blocks Used:
/dev/ad0s1b 48211256
On Sat, 11 Dec 2004 09:22:23 -0600, Kevin D. Kinsey, DaleCo, S.P.
<[EMAIL PROTECTED]> wrote:
> Simon Burke wrote:
>
>
>
> >Hiya,
> >
> >After a while of using 5.3RELEASE, i have noticed a small problem, my
> >swap partition isnt getting used. Well its
Simon Burke wrote:
Hiya,
After a while of using 5.3RELEASE, i have noticed a small problem, my
swap partition isnt getting used. Well its not a small problem
considering that i have only 256mb ram on this machine.
boredom# swapctl -l
Device: 1024-blocks Used:
/dev/ad0s1b 482112
Hiya,
After a while of using 5.3RELEASE, i have noticed a small problem, my
swap partition isnt getting used. Well its not a small problem
considering that i have only 256mb ram on this machine.
boredom# swapctl -l
Device: 1024-blocks Used:
/dev/ad0s1b 48211256
this i
Loren M. Lang writes:
> Looking through the system startup scripts I discovered that the
> system runs a program called savecore that save a core dump to a
> file in /var/crash from a previous crash. The problem is that
> this is run after swap has been turned on.
True.
Howe
I have a freebsd 5.3 system that ocassionally panics on shutdown so I
thought it might be good to get a core dump of it. Since I don't have a
partition decidated for that, I thought I might be able to use my swap
partition for it since it's twice the size of my ram and that it's
On Mon, 01 Nov 2004 10:46:35 +0100
Nagilum <[EMAIL PROTECTED]> wrote:
> The partition itself is encrypted so it doesn't matter whether the
> partition contains a regular filesystem, swapfs or is used as database
>
> storage device. It's encrypted one layer below.
> Kind regards,
> Alex.
Thanks
f that last sentence is true. What about the swap
partition? Is it simply bypassed, or does one need to do something to
create an encrypted swap partition?
regards,
Robert
___
[EMAIL PROTECTED] mailing list
http://lists.freebsd.org/mailman/listinfo/
No cleartext ever touches the hard drive's platter.
But I wonder if that last sentence is true. What about the swap
partition? Is it simply bypassed, or does one need to do something to
create an encrypted swap partition?
regards,
Robert
___
[EMAIL
Hello.
I've got a 4.10 server which sometimes reboots itself, so I'd like it to
create crash dumps for me to analize, but, after an upgrade, no swap
partition is big enough to hold its entire RAM. So I tought I could join
two of them with vinum...
Any hint?
Any tutorial?
Any reason
On Tuesday 11 November 2003 00:12, Daniela wrote:
> Hi all, I'm creating a Knoppix-like FreeBSD release (live filesystem, runs
> from CD) with 4.9 sources. I'm almost done, but I don't know what to do
> with swap. I read somewhere that I must have a swap partition in my
Hi all, I'm creating a Knoppix-like FreeBSD release (live filesystem, runs
from CD) with 4.9 sources. I'm almost done, but I don't know what to do with
swap. I read somewhere that I must have a swap partition in my /etc/fstab,
can't this requirement be overridden?
And can I
On Fri, Nov 15, 2002 at 07:21:37AM -0800, Krissada Jindanupajit (FreeBSD-question)
wrote:
> Can I install FreeBSD without swap space or I can add "swapfile" later?
>
> The goal is to make installation process easy.
It's possible to install without a dedicated swap parti
Can I install FreeBSD without swap space or I can add "swapfile" later?
The goal is to make installation process easy.
Thank.
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