[Freeswitch-users] High CPU usage and Slow BLFs with only 8 channels?
Bote Man
botelist at gmail.com
Mon Sep 27 15:43:30 UTC 2021
It's possible that it is not the script itself causing the problem, but rather the choice of how to execute it. I'm just throwing stuff at the wall to see if it sticks, but running scripts within the channel/telephony session usually causes problems of various sorts.
Ken's idea of monitoring ESL events eliminates this possibility, if it's doable.
Alternatively, if you could kick off the script in a separate thread/run space that might help. Let the telephony session do its thing and do accounting and other work elsewhere.
This is just generalized advice.
---
John Boteler
Bote Communications
-----Original Message-----
From: FreeSWITCH-users <freeswitch-users-bounces at lists.freeswitch.org> On Behalf Of Jerry Kendall
Sent: Sunday, 26 September, 2021 13:15
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] High CPU usage and Slow BLFs with only 8 channels?
So, after 3 weeks of trying to get to the bottom of the problem,
it turns out that it was my LUA scripts...
Kill the LUA scripts and the problems all vanished (ran SIPp at 30cps for an hour and no issues).
The lua scripts are very simple, they are used to log selected events in the DB...
So, the next question: why would launching a lua script to save event data in the DB cause such problems....
The lua script is basically:
=====================================
local function CallBack_1(row)
end
local function SaveEventInfo()
local EventName = getSIPHeader("Event-Name")
local EventSubClass = getSIPHeader("Event-Subclass")
local CoreUUID = getSIPHeader("Core-UUID")
local Switchname = getSIPHeader("FreeSWITCH-Switchname")
local Sequence = getSIPHeader("Event-Sequence")
local State = getSIPHeader("Channel-State")
//get a few more headers
Build SQL statement = ......
ConnectDB()
dbh:query(SQL, CallBack_1)
DisconnectDB()
end
if ( EventName == "CHANNEL_CREATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_DESTROY" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_STATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_CALLSTATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_ANSWER" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_HANGUP" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_EXECUTE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_HOLD" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNHOLD" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_BRIDGE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNBRIDGE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PROGRESS" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PROGRESS_MEDIA" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_OUTGOING" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PARK" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNPARK" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_APPLICATION" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_ORIGINATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UUID" ) then SaveEventInfo()
elseif ( EventName == "CUSTOM" ) then SaveEventInfo()
end
===============================================
Any thoughts?
On 9/24/2021 8:19 PM, Jerry Kendall wrote:
> Hello all,
>
> I'm having some interesting problems with our Freeswitch system.
>
> I have found Tim's posting
> athttps://lists.freeswitch.org/pipermail/freeswitch-users/2012-Februar
> y/080422.html
>
> It seems very similar but does not help me... Wish it did.
>
>
> Hardware: Dell R610, dual 6 core Xeon X5680 @ 3.3GHz with 10 Gig of
> RAM
> Network: Dual 10Gig Fiber to 40Gig fabric
>
> Databases: also Dell R610 with dual 10Gig and Mariadb 10.5.9 NO ISSUES
> - VERY FAST - ULTRA LOW LATENCY
>
>
>
> We have 2 different FS systems
> 1) One acting as an SBC of sorts - process SIP/RTP
> 2) One acting as a PBX - process SIP/RTP
>
> Providers are connected to SBC (public - context) PBX (sbc - context)
> connects to SBC (internal - context) End Points connect to PBX (device
> - context)
>
> picographically:
>
> ITSP --- SBC --- PBX --- EndPoints
>
> The machine running FreeSWITCH as an SBC is fine - 50 calls (100
> sessions) and near zero load average - CPU idle 98% - ALL GREAT
>
> About 100 devices registered, all NAT'd, approx 50 subscription via
> BLF buttons Registration period is maxed to 60 minutes and most
> devices use the default of 60 minutes
>
> Typically, We see only a few CPS, maybe 5 if it's really busy
>
> All our trunks are SIP. Only using PCMU/8000 codec.
>
> We use MARIADB in the core - as well as for sofia, voicemail, and anything else that can use it.
>
> Config, Directory and dialplan are done using CURL and handled via apache2 on the same server over 127.0.0.1.
>
> I keep hearing about FS systems handling thousands of users on one box.
> I'm nowhere near that and it seems to be maxed out.
>
> Freeswitch on both systems is Version 1.10.6-release git 1ff9d0a
> 2021-03-25 13:16:09Z 64bit
>
> So... The problem
>
> The machine running FreeSWITCH as a PBX seems to be struggling during periods of any usage - even only 1 call (2 channels).
>
> Just a moment ago, load average is 4.5 - CPU Idle is 65% - 8 sessions
> active - 315 sessions since startup - 45 threads - 8 hours running
>
> The audio seems fine - no complaints reported..
> There is a very noticable chocking on the BLFs though... Every few
> minutes, the BLFs just freeze - yes - freeze... Then they catch up
>
> for example, for testing this, I have programmed a BLF on one phone.
>
> I run manually "luarun /etc/freeswitch/scripts/on.lua
> *8896 at domain.com" - the lights turns red then after a few seconds, I
> run manually "luarun /etc/freeswitch/scripts/off.lua *8896 at domain.com"
> - the light turns green Sometimes, when I run these manually, the lights take 30 seconds to change - sometimes - usually, under a second.
>
>
> They change the state of the subscribe target Here is the LUA script
> to turn the light ON(RED)
>
> ##############################################################
> #!/lua
>
> local random = math.random
> math.randomseed(os.time())
>
> local function uuid()
> local template ='xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
> return string.gsub(template, '[xy]', function (c)
> local v = (c == 'x') and random(0, 0xf) or random(8, 0xb)
> return string.format('%x', v)
> end)
> end
>
> local function SendCallDirectorBLFevent()
>
> Uuid = uuid()
>
> local event = freeswitch.Event("PRESENCE_IN")
> event:addHeader("proto", "sip")
> event:addHeader("event_type", "presence")
> event:addHeader("alt_event_type", "dialog")
> event:addHeader("Presence-Call-Direction", "outbound")
> event:addHeader("from", argv[1])
> event:addHeader("login", argv[1])
> event:addHeader("unique-id", Uuid )
> event:addHeader("answer-state", "confirmed")
> event:fire();
> end
>
> SendCallDirectorBLFevent()
> ##############################################################
>
> The issue is the choking on the BLFs and the HIGH load avg for such small amounts of calls on the PBX - the SBC seems fine.
>
> SO.....
>
> I have been trying to resolve this for about a month - looking everywhere I could.
> I have monitored the network stats, disk IO stats, cpu usage, processes, etc.... I don't see anything different between the SBC and PBX stats...
>
>
> I would like the BLFs to show the correct state a little faster (more like half a second, not 10-60 seconds after the event) and would I like to know how to fix the high CPU load on the PBX.
>
> I have confirmed 2 things today:
> 1) it's not using mod_mariadb as I put back the ODBC and not help
> 2) this is seems most noticeable when new calls come in. The BLFs pause to 5-8 seconds and continue - there is a noticeable spike in load avg when calls keep coming in for 5 minutes...
>
>
> Any information that would be helpful?
>
>
> Thanks,
> Jerry
>
>
> ______________________________________________________________________
> ___
>
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>
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>
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_________________________________________________________________________
The FreeSWITCH project is sponsored by SignalWire https://signalwire.com Enhance your FreeSWITCH install with disruptive priced SMS and PSTN services.
Build your next product on our scalable cloud platform.
Join our online community to chat in real time https://signalwire.community
Professional FreeSWITCH Services
sales at freeswitch.com
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https://freeswitch.org/confluence
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