Hi,
I've been following this thread with great interest (many thanks to Matt!),
and it reminded me of some rumours of a book being written by Kirk McKusick
and some other people on the design of FreeBSD OS. Hopefully this book will
cover the subject of VM in great detail. Does anybody know if the
:It will use all available memory for disk caching if possible, but it
:only caches things you've accessed at least once so I would say you
:simply haven't accessed more then 650MB or so worth of file data.
:
:Is it correct to say that cached file data (file content)
:is taken into a
Hi,
>:Mem: 138M Active, 661M Inact, 114M Wired, 48M Cache, 112M Buf, 44M Free
>:Swap: 1612M Total, 16K Used, 1612M Free
>:
>:Yes I know it has too much memory, but I'm surprised why more isn't used
>:for disk caching
It will use all available memory for disk caching if possible, but it
:About a year ago, I was looking through the VM code, and saw that the
:'re' field in vmstat is just Cache reactivations, and not both
:Inactive & Cache. I just figured it was how it was supposed to be.
:Could it be that 're' should include *all* reactivations?
:
:If so, would I be correct in sug
Hi Matt,
[...great comments on the VM writeup from the handbook...]
On Thu, 8 Mar 2001, Matt Dillon wrote:
> This type of load is visible by noting the amount of page scanning
> the system does (the 'sr' field in vmstat) and the number of reactivations
> (the 're' field in vmstat).
In the last episode (Mar 08), Matt Dillon said:
> Jesper Skriver wrote:
> :Could you please give a pointer to a description of the meaning of
> :Active, Inactive and Cache, on a machine I see this
>
> ActiveThis queue represents pages that are in active use by
> programs. T
:
:On Mon, Mar 05, 2001 at 06:08:25PM -0800, Matt Dillon wrote:
:>
:> :I am trying to figure out corelation between Inactive and Free then.
:> :Inact would be unused ram right?
:> :Free would be what how much of Active is being used? So what you are
:> :saying is if there is to much free then al
On Mon, Mar 05, 2001 at 06:08:25PM -0800, Matt Dillon wrote:
>
> :I am trying to figure out corelation between Inactive and Free then.
> :Inact would be unused ram right?
> :Free would be what how much of Active is being used? So what you are
> :saying is if there is to much free then alot of act
Dan Phoenix <[EMAIL PROTECTED]> writes:
> systat -iostat
>
> /0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100
> ad0 MB/s
> tps|XXX
>
> [...]
> systat -vmstat
>
> Disks ad0 acd0 fd0 md0 89 ofodintrn
> KB/t 4.35 0.00 0.00 0.00
:I am trying to figure out corelation between Inactive and Free then.
:Inact would be unused ram right?
:Free would be what how much of Active is being used? So what you are
:saying is if there is to much free then alot of active pages are being
:killed for some reason...as seen in error logs etc
t;[EMAIL PROTECTED]>
> Cc: [EMAIL PROTECTED]
> Subject: Re: systat -vmstat or iostat IO help
>
>
>
> [Mon Mar 5 11:04:01 2001] [error] (54)Connection reset by
> peer: getsockname
> [Mon Mar 5 11:04:01 2001] [error] (54)Connection reset by
> peer: getsockname
>
>
AIL PROTECTED]
> Subject: Re: systat -vmstat or iostat IO help
>
>
> :Well we use php mostly. I noticed from moving from php3 to php4
> :memory consumption on webservers was just incredible and had to
> :increase ram from 256 megs to 500megs on each of webservers.
> :Memory
:Well we use php mostly. I noticed from moving from php3 to php4
:memory consumption on webservers was just incredible and had to
:increase ram from 256 megs to 500megs on each of webservers.
:Memory is fine now.
:
:[root@lotho dphoenix]# ps aux|grep httpd|wc -l
: 65
:[root@lotho dphoenix]#
if the drive is doing more than say 166 seeks on
disk per sec. Any great tool out there :)
On Mon, 5 Mar 2001, Matt Dillon wrote:
> Date: Mon, 5 Mar 2001 17:02:15 -0800 (PST)
> From: Matt Dillon <[EMAIL PROTECTED]>
> To: Dan Phoenix <[EMAIL PROTECTED]>
> Cc: [EMAIL PROT
:
:
:
:this is a webserver ..i am trying to figure out if cpu increase or
:scsi drives is better in this situation. Right now...that is a big
:decision because there are approx 30 fbsd webservers not all showing
:high IO from vmstat...just the ones with the highest uptime.
:...
Check
Mar 2001, Matt Dillon wrote:
> Date: Mon, 5 Mar 2001 16:31:45 -0800 (PST)
> From: Matt Dillon <[EMAIL PROTECTED]>
> To: Dan Phoenix <[EMAIL PROTECTED]>
> Cc: [EMAIL PROTECTED]
> Subject: Re: systat -vmstat or iostat IO help
>
> :systat -vmstat
> :
> :Disks
:systat -vmstat
:
:Disks ad0 acd0 fd0 md0 89 ofodintrn
:KB/t 4.35 0.00 0.00 0.00 85 %slo-z61952 buf
:tps 13 0 0 0 104 tfree42 dirtybuf
:MB/s 0.05 0.00 0.00 0.00 36095 desiredvnodes
:% busy 10
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