On Wed, 29 May 2013 19:52:02 + (UTC)
jb wrote:
RW rwmaillists at 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
RW rwmaillists at 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
RW rwmaillists at 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
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
Fred Morcos fred.morcos at 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
On Wed, May 29, 2013 at 1:19 PM, jb jb.1234a...@gmail.com wrote:
Fred Morcos fred.morcos at 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
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, 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_swappgsout:
On Wed, May 29, 2013 at 6:19 AM, jb jb.1234a...@gmail.com 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.
On Sun, May 26, 2013 at 6:17 PM, Adam Vande More amvandem...@gmail.comwrote:
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
On Wed, 29 May 2013, Michael Sierchio wrote:
On Sun, May 26, 2013 at 6:17 PM, Adam Vande More amvandem...@gmail.com 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
On Wed, May 29, 2013 at 1:05 PM, Warren Block wbl...@wonkity.com 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
PS -- Moderating questions@ is just awful. I'm disappointed.
On Wed, May 29, 2013 at 1:34 PM, Adam Vande More amvandem...@gmail.com wrote:
On Wed, May 29, 2013 at 1:05 PM, Warren Block wbl...@wonkity.com wrote:
And you don't think the presence of TRIM--where the SSD can actually know
which
RW rwmaillists at 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
On Wed, May 29, 2013 at 2:52 PM, jb jb.1234a...@gmail.com 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
On May 29, 2013, at 3:52 PM, jb jb.1234a...@gmail.com 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
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
On Tue, May 28, 2013 at 8:42 PM, jb jb.1234a...@gmail.com 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
On 26. mai 2013, at 10:58, M. V. bored_to_deat...@yahoo.com 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 objected to
jb jb.1234abcd at gmail.com writes:
M. V. bored_to_death85 at 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. I bet he spoke
Hi,
On Sun, 26 May 2013 01:58:32 -0700 (PDT)
M. V. bored_to_deat...@yahoo.com 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 that I
On Sun, 26 May 2013 16:09:06 +0700, Erich Dollansky wrote:
Hi,
On Sun, 26 May 2013 01:58:32 -0700 (PDT)
M. V. bored_to_deat...@yahoo.com 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
On Sun, 26 May 2013 01:58:32 -0700 (PDT)
M. V. bored_to_deat...@yahoo.com 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
Hi,
sorry for my English. Here is what I wanted to say.
On Sun, 26 May 2013 16:09:06 +0700
Erich Dollansky erichsfreebsdl...@alogt.com wrote:
Hi,
On Sun, 26 May 2013 01:58:32 -0700 (PDT)
M. V. bored_to_deat...@yahoo.com wrote:
I have a 24/7 network server/gateway with FreeBSD-8.2 on a
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 have swap
partition for my
M. V. bored_to_death85 at 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
swap partition
The Intel SLC mSATA drives I use in embedded devices don't support TRIM,
but - it doesn't seem to matter. Actually, I'm confident that just using
bare partitions for swap is fine, and I haven't had any of the trouble I
witnessed with MLC devices. The difference is that the size is limited to
On Sun, 26 May 2013, Polytropon wrote:
On Sun, 26 May 2013 16:09:06 +0700, Erich Dollansky wrote:
Hi,
On Sun, 26 May 2013 01:58:32 -0700 (PDT)
M. V. bored_to_deat...@yahoo.com wrote:
I have a 24/7 network server/gateway with FreeBSD-8.2 on a SSD drive.
it's partitioned as normal (/ , /tmp,
On Sun, May 26, 2013 at 6:32 PM, Warren Block wbl...@wonkity.com 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
On Sun, 26 May 2013, Adam Vande More wrote:
On Sun, May 26, 2013 at 6:32 PM, Warren Block wbl...@wonkity.com 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
On Sun, May 26, 2013 at 7:20 PM, Warren Block wbl...@wonkity.com wrote:
Which part?
This part: Another problem with SSDs is that they can have
difficulty with wear leveling. Do as I suggested and you'll get
maximum life from the drive even with swap present. Even absent of
best practices,
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