Thank you Mark. This is not urgent so please don't put yourself out for
me.
Kind regards,
Sophie Loewenthal
Server Infrastructure
Smals.be
From: Mark Seger <[email protected]>
To: [email protected],
Cc: "[email protected]"
<[email protected]>
Date: 31/10/2016 13:07
Subject: Re: [Collectl-interest] collectl : how can I display
columns : PureAcks HPAcks Loss FTrans ?
looks like 3.6.3 has that format, but that is also 4 years old so no
telling what had broken with newer kernels. I will try to do something in
the newer versions to restore these but that won't be immediately
-mark
On Mon, Oct 31, 2016 at 4:33 AM, <[email protected]> wrote:
Hi Mark,
> it came from an older version collectl, is that right?
Yes it did, but copied from a blog entry.
Do you recall the version with the old network stats? I can use this
instead.
Kind regards,
Sophie Loewenthal
Server Infrastructure
Smals.be
From: Mark Seger <[email protected]>
To: [email protected],
Cc: "[email protected]" <
[email protected]>
Date: 28/10/2016 16:34
Subject: Re: [Collectl-interest] collectl : how can I display
columns : PureAcks HPAcks Loss FTrans ?
I'm a little confused. The output in your first example looks like it
came from an older version collectl, is that right? Awhile back I changed
things to allow collectl to collect more network stats and so now in brief
format it just shows error counts for 4 different kind of network stats.
To get the specific fields, of which there are now well over 50, you need
to specify a filter for the type of data you're interested in using
--tcpfilt. Furthermore you need to tell collectl to report in --verbose
rather than brief. This data is now reported as TCP Extended stats which
you access via --tcpfilt T.
To make things a little more complicated, sorry about this, since there is
so much data and wanting to use fixed width fields I needed to come up
with different names that were also more reflective of the data elements,
which you can see if you look at /proc/net/snmp. and /proc/net/netstat.
Looking more closely at both the code and the description of the output
in http://collectl.sourceforge.net/Data-verbose.html I can see where
making/documenting all those changes has led to some confusion.
specifically, look at this:
mjs@blkjak:~$ collectl -c1 -st --tcpfilt T --verbose
waiting for 1 second sample...
# TCP STACK SUMMARY (/sec)
#<------------------------------------------TcpExt----------------------------------------->
# FasTim Reject DelAck QikAck PktQue PreQuB HdPdct AkNoPy PreAck DsAcks
RUData REClos SackS
0 0 0 0 0 0 0 1 0 0
0 0 0
As it turns out, PureAcks and HPAcks are now the AkNoPy and PreAck fields.
I've no idea why I called them that but can certainly clean up the
documentation to say so. Also as for loss and fastretrans, I'm not
reporting them at all here but do so in plot format. I'm not really sure
how that happened:
collectl -c1 -st -P
waiting for 1 second sample...
#Date Time [TCP]IpErr [TCP]TcpErr [TCP]UdpErr [TCP]IcmpErr [TCP]Loss
[TCP]FTrans
20161028 10:33:04 0 0 0 0 0 0
This will take some more thinking on my part. Sorry about all this...
-mark
On Fri, Oct 28, 2016 at 7:43 AM, <[email protected]> wrote:
Dear Mark,
How can I get this read out from collectl?
[root@poker ~]# collectl -st
waiting for 1 second sample...
#<------------TCP------------->
#PureAcks HPAcks Loss FTrans
3 0 0 0
1 0 0 0
When I run this I have,
# collectl -s t
waiting for 1 second sample...
#<-------TCP-------->
# IP Tcp Udp Icmp
0 0 0 0
0 0 0 0
0 0 0 0
Version #
# collectl -v
collectl V4.1.0-1 (zlib:2.021)
Thanks for letting me know.
Kind regards,
Sophie Loewenthal
Server Infrastructure
Smals.be
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