16 Bře
2018
16 Bře
'18
16:12
Hi Aleš,
Interesting :-) I will look at it!
I think you could configure the modules (at least rrl) common for all zones, see
https://www.knot-dns.cz/docs/2.6/singlehtml/index.html#global-module
Best,
Daniel
On 03/16/2018 04:03 PM, Aleš Rygl wrote:
Hello Daniel
to my big surprise, when mod-rrl is disabled, memory consumption is nearly negligible!
root@eira:~# uptime
15:59:34 up 0 min, 1 user, load average: 0.15, 0.03, 0.01
root@eira:~#
root@eira:~# free -h
total used free shared buff/cache available
Mem: 2.0G 54M 1.8G 2.9M 78M 1.8G
Swap: 0B 0B 0B
root@eira:~#
root@eira:~# systemctl start knot
root@eira:~#
root@eira:~# free -h
total used free shared buff/cache available
Mem: 2.0G 56M 1.8G 2.9M 81M 1.8G
Swap: 0B 0B 0B
root@eira:~#
From proces status:
VmPeak: 22952964 kB
VmSize: 22952964 kB
VmLck: 0 kB
VmPin: 0 kB
VmHWM: 9128 kB
VmRSS: 8984 kB
RssAnon: 2820 kB
RssFile: 6164 kB
RssShmem: 0 kB
VmData: 47496 kB
VmStk: 132 kB
VmExe: 516 kB
VmLib: 11488 kB
VmPTE: 320 kB
VmPMD: 24 kB
VmSwap: 0 kB
What do you think about it?
BR
Ales
On 16.3.2018 15:47, Aleš Rygl wrote:
Hello Daniel.
On 16.3.2018 10:55, Daniel Salzman wrote:
Aleš,
On 03/16/2018 10:32 AM, Aleš Rygl wrote:
Of course, you are right, I have somehow overlooked it. Sorry for confusion.
I have tried to disable all statistics in the config. It is much better now. Freshly
rebooted server and knot started.
root@eira:~# systemctl start knot.service
root@eira:~# free -h
total used free shared buff/cache available
Mem: 2.0G 758M 1.1G 2.9M 80M 1.1G
Swap: 0B 0B 0B
root@eira:~#
From process status in /proc:
VmPeak: 24751880 kB
VmSize: 24686344 kB
VmLck: 0 kB
VmPin: 0 kB
VmHWM: 1742692 kB
VmRSS: 1742584 kB
RssAnon: 1736288 kB
RssFile: 6296 kB
RssShmem: 0 kB
VmData: 1780864 kB
VmStk: 132 kB
VmExe: 516 kB
VmLib: 11488 kB
VmPTE: 3704 kB
VmPMD: 32 kB
VmSwap: 0 kB
BR
Ales Hi Daniel, hi all.
I completely agree that VmSize is not the right metric and I was not mentioning it in my
original post :-) I'd rather point out that Knot is in my case consuming nearly 2Gig
of RAM while serving just 141 zones with 1MB of records while Bind serving 1560 zones (10%
on DNSSEC) something about 550MB =-O
root@eira:~# free -h
total used free shared buff/cache available
Mem: 2.0G 1.7G 122M 5.4M 126M 109M
Swap: 0B 0B 0B
root@eira:~#
root@eira:~# systemctl stop knot.service
root@eira:~#
root@eira:~# free -h
total used free shared buff/cache available
Mem: 2.0G 54M 1.8G 5.4M 126M 1.8G
Swap: 0B 0B 0B
root@eira:~#
Is it something what I have to count on when using Knot? I am just surprised by such
memory requirements and your measurement shows that it is like that. I will have to add
some RAM...
Probably I don't understand. Knot consumed less physical memory
than Bind during my test :-)
To be honest, I don't understand why Knot is consuming such amount of memory in your
case!
Could you please try disabling the statistics module? Statistics per zone with all
metrics consume
some memory.