Questions[statistics](server)

I am trying to get statistics for subinterfaces on a Cisco Nexus3500 C3548P-10GX switch.

The subinterface is configured for a port channel as shown below.

interface port-channel3.1802
  encapsulation dot1q 1802
  ip address 192.168.1.165/30

There is nothing shown as statistics for VLAN or subinterface.

NEXUS(config)# sh interface port-channel3.1802
port-channel3.1802 is up
admin state is up,, [parent interface is port-channel3]
  Hardware: Port-Channel, address: xxxx.xxxx.7641 (bia xxxx.xxxx.7608)
  Description: vlan for internet
  Internet Address is 192.168.1.165/30
  MTU 1500 bytes, BW XXXX000 Kbit, DLY 10 usec
  reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID 1802, medium is broadcast
  Auto-mdix is turned off
  Switchport monitor is off
  EtherType is 0x8100

NEXUS(config)# sh interface vlan 1802
Vlan1802 is up, line protocol is up, autostate enabled
  Hardware is EtherSVI, address is XXX.XXX.XXX
  Description: MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
   reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not supported
  ARP type: ARPA
  Last clearing of "show interface" counters never
  L3 in Switched:
    ucast: 14385814 pkts, 1951146757 bytes

For other interfaces, I have these statistics:

 RX
    285716197370 unicast packets  1725784 multicast packets  1273 broadcast packets
    285717924427 input packets  279284980293540 bytes
    0 jumbo packets  0 storm suppression packets
    0 runts  0 giants  0 CRC  0 no buffer
    0 input error  0 short frame  0 overrun   0 underrun  0 ignored
    0 watchdog  0 bad etype drop  0 bad proto drop  0 if down drop
    0 input with dribble  0 input discard
    0 Rx pause
  TX
    10240494209194 unicast packets  0 multicast packets  0 broadcast packets
    10240494209298 output packets  14411966319769316 bytes
    0 jumbo packets
    0 output error  0 collision  0 deferred  0 late collision
    0 lost carrier  0 no carrier  0 babble  12372589734 output discard
    0 Tx pause

show version:

Software
  BIOS: version 5.3.1
  NXOS: version 7.0(3)I7(7)
  BIOS compile time:  06/04/2019
  NXOS image file is: bootflash:///nxos.7.0.3.I7.7.bin
  NXOS compile time:  8/28/2019 16:00:00 [08/29/2019 00:41:42]

Is there any way to enable statistics for subinterfaces?

I am running a NTP server on an Ubuntu 20.04 LTS. The server work fine and the client poll correctly the server. But i keep getting a permission error when i want to record statistics.

I tried to include the following lines in ntp.conf :

statistics rawstats
statsdir /var/log/ntpstats/
filegen rawstats file raw type day link enable

When looking at systemctl ntp status :

mars 05 09:08:48 RD-NTP ntpd[3534] : can't open /var/log/ntpstats/raw.20210305: Permission denied
mars 05 09:08:50 RD-NTP ntpd[3534] : can't open /var/log/ntpstats/raw.20210305: Permission denied
mars 05 09:08:52 RD-NTP ntpd[3534] : can't open /var/log/ntpstats/raw.20210305: Permission denied
mars 05 09:08:54 RD-NTP ntpd[3534] : can't open /var/log/ntpstats/raw.20210305: Permission denied

But for me, the directory have the correct permissions ls -al :

drwxr-xr-x 2 ntp ntp 4096 april 2 2020 .

Before choosing the default folder, i tried with one i created and adding ntp in the permission using this command : chmod ntp:ntp /home/ubuntu/ntpstats/, it wasnt working so i switched to this one, not working either.

Do you know why ntpd keep getting error even if ntp have the upper hand on the folder ?

Our team is trying to see if we should use the managed AWS API gateway over IDC Kong for API Gateway.

So I am looking for some concrete statistics for AWS managed service (In particular, AWS API Gateway).

But the total downtime per year region statistics is surprisingly difficult to find from the AWS official website.

I looked at the SLA agreement (https://aws.amazon.com/api-gateway/sla/) that seems to guarantee up to 95% availability - that is totally out of the question. 18 days per year we might as well just go out of the business. And they only reimburse the credit used - not the total losses incurred due to the downtime.

There is also service health dashboard that shows current health and status history. But I need something way better than that - pie chart for total downtime in minutes during 2019, 2018, 2017 in each regions.

I found this stats "Modernize your Microsoft Applications on AWS" but again its not specific enough - it combines all services and regions.

Why are these stats so difficult to find? I am sure this is one of the more important metrics for choosing the service?

Many thanks in advance

Trying to get some disk performance metrics (in particular, using munin), found that /proc/diskstats does not exist.

Tried yum provides '*/diskstats' but nothing except munin was found.

CentOS release 6.7 (Final)

uname -a
Linux domain.com 2.6.32-042stab112.15 #1 SMP Tue Oct 20 17:22:56 MSK 2015 x86_64 x86_64 x86_64 GNU/Linux

So, how can I fix it?

I've got some sysstat data that has been captured from servers with SAR, and I'm unsure what is the best way to analyze that data.

I've found ksar, but it seems to be quite old and out of date. I'd prefer to be able to analyze in a graphical manner, but I can't seem to find any other useful tools for this.