Add way to supress missed tick output

[freeboson]

SUMMARY

I have a system under heavy load, and I don't need to see that the averaging missed 2-3 ticks every interval. It spoils the fixed-col output and is unnecessary. I would like to choose to disable this output.

ISSUE TYPE

• Feature Idea

DSTAT VERSION

Dstat 0.7.3
Written by Dag Wieers <dag@wieers.com>
Homepage at http://dag.wieers.com/home-made/dstat/

Platform posix/linux2
Kernel 4.13.12-1-ARCH
Python 2.7.14 (default, Sep 20 2017, 01:25:59)
[GCC 7.2.0]

Terminal type: screen-256color (color support)
Terminal size: 70 lines, 274 columns

Processors: 4
Pagesize: 4096
Clock ticks per secs: 100

internal:
        aio, cpu, cpu-adv, cpu-use, cpu24, disk, disk24, disk24-old, epoch, fs, int, int24, io, ipc, load, lock, mem, mem-adv, net, page, page24, proc, raw, socket, swap, swap-old, sys, tcp, time, udp, unix, vm, vm-adv, zones
/usr/share/dstat:
        battery, battery-remain, condor-queue, cpufreq, dbus, disk-avgqu, disk-avgrq, disk-svctm, disk-tps, disk-util, disk-wait, dstat, dstat-cpu, dstat-ctxt, dstat-mem, fan, freespace, fuse, gpfs, gpfs-ops, helloworld, innodb-buffer, innodb-io, innodb-ops, lustre,
        md-status, memcache-hits, mysql-io, mysql-keys, mysql5-cmds, mysql5-conn, mysql5-innodb, mysql5-innodb-basic, mysql5-innodb-extra, mysql5-io, mysql5-keys, net-packets, nfs3, nfs3-ops, nfsd3, nfsd3-ops, nfsd4-ops, nfsstat4, ntp, postfix, power, proc-count, qmail,
        redis, rpc, rpcd, sendmail, snmp-cpu, snmp-load, snmp-mem, snmp-net, snmp-net-err, snmp-sys, snooze, squid, test, thermal, top-bio, top-bio-adv, top-childwait, top-cpu, top-cpu-adv, top-cputime, top-cputime-avg, top-int, top-io, top-io-adv, top-latency,
        top-latency-avg, top-mem, top-oom, utmp, vm-cpu, vm-mem, vm-mem-adv, vmk-hba, vmk-int, vmk-nic, vz-cpu, vz-io, vz-ubc, wifi, zfs-arc, zfs-l2arc, zfs-zil

OS / ENVIRONMENT

On ArchLinux. Not platform specific.

STEPS TO REPRODUCE

dstat -tdD total,nvme0n1,md0 60 # with a heavy load

EXPECTED RESULTS

----system---- -dsk/total--dsk/nvme0n1---dsk/md0--
     time     | read  writ: read  writ: read  writ
12-12 10:57:19|3842k 5943k:  32k  120k:5006k 6667k
12-12 10:58:19|  99M   95M: 751B   64k: 159M  138M
12-12 10:59:19| 100M   97M:   0    43k: 161M  141M

ACTUAL RESULTS

dstat -tdD total,nvme0n1,md0 60
----system---- -dsk/total--dsk/nvme0n1---dsk/md0--
     time     | read  writ: read  writ: read  writ
12-12 10:57:19|3842k 5943k:  32k  120k:5006k 6667k
12-12 10:58:19|  99M   95M: 751B   64k: 159M  138M missed 2
ticks
12-12 10:59:19| 100M   97M:   0    43k: 161M  141M missed 2
ticks