Testing via pool

[Hal Murray]

> Two of my servers are in the NTP pool...

You can get some interesting data if you kick up the memory for the MRU list. 
 A US/NA server needs 325K to hold everything for a bit over a day.  
Something like:

# 88200 = 86400 + 30*60
mru initmem 100000 maxmem 500000 maxage 88200 minage 3600


addresses:              3776369
peak addresses:         3776369
maximum addresses:      5818181
reclaim above count:    600
reclaim maxage:         90000
reclaim minage:         3600
kilobytes:              324532
maximum kilobytes:      500000
alloc: exists:          307642121
alloc: new:             3776369
alloc: recycle old:     29055766
alloc: recycle full:    0
alloc: none:            0
age of oldest slot:     93040


You can get interesting data with things like:
  /usr/local/bin/ntpq -nc "mru mincount=100000 sort=avgint" <target>
  /usr/local/bin/ntpq -nc "mru mincount=1000 sort=avgint"  <target>

 lstint avgint rstr r m v  count rport remote address
=====================================================
      1  0.937   90 . 3 3 1012928 64804 40.141.174.100
      0  0.978   90 . 3 3 970637 38709 40.141.174.101
      1   1.04   90 . 3 4 908887 62930 131.107.174.109
      2   1.79   90 . 3 3 530453 50166 207.144.49.170
     48   2.40   90 . 3 4 394639   123 204.186.6.242
    224   2.80   90 . 6 2 338600 36832 ::1
      3   2.94   90 . 3 4 322787 52223 107.20.175.217

 lstint avgint rstr r m v  count rport remote address
=====================================================
  88061  0.035   90 . 3 1  10621  2820 179.184.94.28
  37706  0.051   90 . 3 3   2379 58422 97.73.10.130
  10229  0.060   90 . 3 4   2527 62353 76.216.210.22
  28937  0.061   90 . 3 4   2494 61253 104.63.129.67
  29542  0.066   90 . 3 3   1778 26527 173.197.81.172
   4570  0.069   90 . 3 3   1385 54757 71.92.220.153
  51592  0.070   90 . 3 3   1647 42172 73.222.215.112
  49602  0.071   90 . 3 3   1071 45130 2601:645:c200:b515:d909:1f4d:bf9a:c605
  11013  0.072   90 . 3 3   1869 42659 2605:e000:151e:41f1:3113:1583:3b3c:dfac
  92275  0.075   90 . 3 3   2002 60707 76.170.7.110
  10319  0.081   90 . 3 3   1062 52116 67.170.129.17
  44856  0.081   90 . 3 3   1196 40647 73.19.92.143
  49304  0.083   90 . 3 3   1806 47957 204.106.232.226

-------

If you want to get the whole thing, you have to run on the same system or new 
data arrives faster than you can retrieve it.  I use "direct" mode to avoid 
using lots of memory.  (and -n to avoid DNS thrashing)

Direct mode will get duplicates when another packet arrives after you have 
read a slot.  (The slots are returned oldest first or rather newest last so 
any packet bumps that slot up to the top/last of the list.)

-- 
These are my opinions.  I hate spam.