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| nestat command and message flow execution |
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| ruimadaleno |
 Posted: Tue Nov 25, 2014 4:02 am Post subject: nestat command and message flow execution |
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Master
Joined: 08 May 2014
Posts: 274
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Hi all,
a quick question just to check my sanity 
WMB 8.0.0.4 running on windows server 2008 R2 Enterprise
Single execution group (named default) listening on port 7800
Using http embedded listener (execution group listener)
in command prompt i run:
netstat -an | find /c "7800"
result: 43
Interpretation: In This point of time there were 43 connections to http embedded listener (in several states of the connection cycle of life - established, time_wait, fin_wait_2 ,etc)
nestat -an | find "7800" | find /c "ESTABLISHED"
result: 6
Interpretation: In This point of time there were 6 message flows executing, ie, processing messages.
is this correct ?
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Best regards
Rui Madaleno |
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| fjb_saper |
| Posted: Tue Nov 25, 2014 2:01 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Possible, but without looking at the connection status itself it is hard to say.
Connections in status FIN_WAIT will still show up in your first query...
Have fun 
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| ruimadaleno |
| Posted: Wed Nov 26, 2014 2:08 am Post subject: |
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Master
Joined: 08 May 2014
Posts: 274
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Hi fjb_saper,
in the second netstat command i use a "filter" to get only the connections on state "ESTABLISHED"
nestat -an | find "7800" | find /c "ESTABLISHED"
what i'm trying to undestand is the relation (if it exists) between the number of connections in state "established" to port 7800 and the number of message flows processing messages in the moment.
So, if the above command result is , let's say, 40 , can i assume that 40 message flows are processing messages ?
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Rui Madaleno |
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| fjb_saper |
| Posted: Wed Nov 26, 2014 6:06 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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No you can assume that 40 instances of message flows are processing...
So if you have 2 message flows at 20 instances total (19 additional) that would mean that you are processing at full capacity?
What has observation told you so far?
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| ruimadaleno |
| Posted: Wed Nov 26, 2014 8:24 am Post subject: |
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Master
Joined: 08 May 2014
Posts: 274
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Hi fjb_saper,
that's not the way i suspect things work.
in a single server, single broker, single execution group, using embedded http listener, if i have 40 connections on state "established" to port 7800 can i assume there are 40 executions of message flows currently running ?
i'm trying to understand if a netstat | find "7800" | find "Established" is a good measure on the load of broker.
I'm not trying to understand if message flow A is processing at full capacity while message flow B is processing at half power. I understand i cannot relate the established connections to a particular message flow because all message flows in this broker share the same port (7800)
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Rui Madaleno |
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| fjb_saper |
| Posted: Wed Nov 26, 2014 8:36 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| ruimadaleno wrote: |
i'm trying to understand if a netstat | find "7800" | find "Established" is a good measure on the load of broker.
I'm not trying to understand if message flow A is processing at full capacity while message flow B is processing at half power. I understand i cannot relate the established connections to a particular message flow because all message flows in this broker share the same port (7800) |
The same way it is an illusion to try to measure the broker load with that key indicator.
Having the count of established connections is just that. You can approximate this to the number of INSTANCES running across all flows, but even there I would not know if this is an exact measure.
If for a certain flow you get a little backup and the queue has some depth (internal queue for http or soap), does that translate in an established connection? You'd have to talk to folks in Hursley about the broker's connection pooling and handling...
The best measure of broker activity / load is still the brokers activity statistics. You may want to enable them for each flow and subscribe to them. Let your monitoring tool collect them. Then you can compare over time.
Have fun
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