TCP packet relay delayed (Kamailio 4.1.5)

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Andrew Chen

18 Apr 2018 18 Apr '18

3 a.m.

Hi Kamailio community, I need your urgent help regarding a situation where the Kamailio TCP packet delayed in relaying SIP packets. They delay between the time Kamailio logs the relay to the time it left the system was ~20 seconds difference, which is huge in SIP world. Any ideas, thoughts or suggestions on how I can narrow down to the problem? We have about 30 cases of this today Thanks in advance. -- Andy Chen Sr. Telephony Lead Engineer achen@ <achen(a)thinkingphones.com>fuze.com -- *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*

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Alex Balashov

18 Apr 18 Apr

5:35 a.m.

...

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

Andrew Chen

5:46 a.m.

Thanks Alex for your response. I honestly forgot about these parameters and will play with them a bit. Is there anyway to log how much is written or stored in the buffer? On Tue, Apr 17, 2018 at 7:35 PM, Alex Balashov <abalashov(a)evaristesys.com> wrote:

...

Hi Kamailio community, I need your urgent help regarding a situation where the Kamailio TCP

packet

delayed in relaying SIP packets. They delay between the time Kamailio

logs

the relay to the time it left the system was ~20 seconds difference,

which

is huge in SIP world. Any ideas, thoughts or suggestions on how I can narrow down to the problem? We have about 30 cases of this today Thanks in advance. -- Andy Chen Sr. Telephony Lead Engineer achen@ <achen(a)thinkingphones.com>fuze.com -- *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient,

you

are hereby notified that any dissemination, distribution or copying of

this

e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail

any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <achen(a)thinkingphones.com>fuze.com -- *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*

Andrew Chen

22 Apr 22 Apr

7:47 p.m.

Hello, Can anyone provide any suggestions on how to log buffer usage? On Tue, Apr 17, 2018 at 7:46 PM, Andrew Chen <achen(a)fuze.com> wrote:

...

Hi Kamailio community, I need your urgent help regarding a situation where the Kamailio TCP

packet

delayed in relaying SIP packets. They delay between the time Kamailio

logs

the relay to the time it left the system was ~20 seconds difference,

which

any

attachments may be confidential. If you are not an intended recipient,

you

are hereby notified that any dissemination, distribution or copying of

this

e-mail is strictly prohibited. If you have received this e-mail in

error,

please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail

any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <achen(a)thinkingphones.com>fuze.com

Daniel-Constantin Mierla

24 Apr 24 Apr

8:45 p.m.

...

Hello, Can anyone provide any suggestions on how to log buffer usage? On Tue, Apr 17, 2018 at 7:46 PM, Andrew Chen <achen(a)fuze.com <mailto:achen@fuze.com>> wrote: Thanks Alex for your response. I honestly forgot about these parameters and will play with them a bit. Is there anyway to log how much is written or stored in the buffer? On Tue, Apr 17, 2018 at 7:35 PM, Alex Balashov <abalashov(a)evaristesys.com <mailto:abalashov@evaristesys.com>> wrote: Hello, Could it be that your send queue or other parameters regulating outgoing flows are too low? Stuff like this: https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_conn_wq_max <https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_conn_wq_max> https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_wq_max <https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_wq_max> -- Alex On Tue, Apr 17, 2018 at 05:00:28PM -0700, Andrew Chen wrote:

Hi Kamailio community, I need your urgent help regarding a situation where the

Kamailio TCP packet

delayed in relaying SIP packets. They delay between the

time Kamailio logs

the relay to the time it left the system was ~20 seconds

difference, which

is huge in SIP world. Any ideas, thoughts or suggestions on how I can narrow down

to the

problem? We have about 30 cases of this today Thanks in advance. -- Andy Chen Sr. Telephony Lead Engineer achen@ <achen(a)thinkingphones.com

<mailto:achen@thinkingphones.com>>fuze.com <http://fuze.com>

-- *Confidentiality Notice: The information contained in this

e-mail and any

attachments may be confidential. If you are not an intended

recipient, you

are hereby notified that any dissemination, distribution or

copying of this

e-mail is strictly prohibited. If you have received this

e-mail in error,

please notify the sender and permanently delete the e-mail

and any

attachments immediately. You should not retain, copy or use

this e-mail or

any attachment for any purpose, nor disclose all or any part

of the

contents to any other person. Thank you.*

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

<https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users> -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users> -- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <mailto:achen@thinkingphones.com>fuze.com <http://fuze.com> -- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <mailto:achen@thinkingphones.com>fuze.com <http://fuze.com> *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.* _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

Andrew Chen

8:46 p.m.

Thanks Daniel. On Tue, Apr 24, 2018 at 10:45 AM, Daniel-Constantin Mierla < miconda(a)gmail.com> wrote:

...

Hello, you can see tcp write queued bytes with: kamctl rpc core.tcp_info If you have an older version, do kamcmd core.tcp_info It may be also the OS queues that are busy, if the other side is not not reading fast, look at netstat output for Send-Queue in: netstat -altp Cheers, Daniel On 22.04.18 18:47, Andrew Chen wrote: Hello, Can anyone provide any suggestions on how to log buffer usage? On Tue, Apr 17, 2018 at 7:46 PM, Andrew Chen <achen(a)fuze.com> wrote:

wrote:

Hi Kamailio community, I need your urgent help regarding a situation where the Kamailio TCP

packet

delayed in relaying SIP packets. They delay between the time Kamailio

logs

the relay to the time it left the system was ~20 seconds difference,

which

any

attachments may be confidential. If you are not an intended recipient,

you

are hereby notified that any dissemination, distribution or copying of

this

e-mail is strictly prohibited. If you have received this e-mail in

error,

please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this

e-mail or

any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <achen(a)thinkingphones.com>fuze.com

-- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <achen(a)thinkingphones.com>fuze.com *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.* _______________________________________________ Kamailio (SER) - Users Mailing Listsr-users@lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierlawww.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

Daniel-Constantin Mierla

8:51 p.m.

Another aspect -- are the connections to be used for transmission already open? If it is a new connection, it can be also the fact that the other side is not accepting the new one very fast. Cheers, Daniel On 24.04.18 19:46, Andrew Chen wrote:

...

Thanks Daniel. On Tue, Apr 24, 2018 at 10:45 AM, Daniel-Constantin Mierla <miconda(a)gmail.com <mailto:miconda@gmail.com>> wrote: Hello, you can see tcp write queued bytes with: kamctl rpc core.tcp_info If you have an older version, do kamcmd core.tcp_info It may be also the OS queues that are busy, if the other side is not not reading fast, look at netstat output for Send-Queue in: netstat -altp Cheers, Daniel On 22.04.18 18:47, Andrew Chen wrote:

Hi Kamailio community, I need your urgent help regarding a situation where the

Kamailio TCP packet

delayed in relaying SIP packets. They delay between

the time Kamailio logs

the relay to the time it left the system was ~20

seconds difference, which

is huge in SIP world. Any ideas, thoughts or suggestions on how I can narrow

down to the

problem? We have about 30 cases of this today Thanks in advance. -- Andy Chen Sr. Telephony Lead Engineer achen@ <achen(a)thinkingphones.com

<mailto:achen@thinkingphones.com>>fuze.com <http://fuze.com>

-- *Confidentiality Notice: The information contained in

this e-mail and any

attachments may be confidential. If you are not an

intended recipient, you

are hereby notified that any dissemination,

distribution or copying of this

e-mail is strictly prohibited. If you have received

this e-mail in error,

please notify the sender and permanently delete the

e-mail and any

attachments immediately. You should not retain, copy or

use this e-mail or

any attachment for any purpose, nor disclose all or any

part of the

contents to any other person. Thank you.*

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org

<mailto:sr-users@lists.kamailio.org>

https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users> -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users> -- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <mailto:achen@thinkingphones.com>fuze.com <http://fuze.com> -- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <mailto:achen@thinkingphones.com>fuze.com <http://fuze.com> *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.* _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users>

-- Daniel-Constantin Mierla www.twitter.com/miconda <http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda> Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com <http://www.kamailioworld.com> -- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <mailto:achen@thinkingphones.com>fuze.com <http://fuze.com> *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*

-- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

Andrew Chen

9:01 p.m.

It's an existing connection. Our clients/servers sends many UPDATE/OPTION to update the state of the meeting on both ends and sometimes these messages don't get a response and affects user experience. On Tue, Apr 24, 2018 at 10:51 AM, Daniel-Constantin Mierla < miconda(a)gmail.com> wrote:

...

Hello, Could it be that your send queue or other parameters regulating outgoing flows are too low? Stuff like this: https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_conn_wq_max https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_wq_max -- Alex On Tue, Apr 17, 2018 at 05:00:28PM -0700, Andrew Chen wrote: > Hi Kamailio community, > > I need your urgent help regarding a situation where the Kamailio TCP packet > delayed in relaying SIP packets. They delay between the time Kamailio logs > the relay to the time it left the system was ~20 seconds difference, which > is huge in SIP world. > > Any ideas, thoughts or suggestions on how I can narrow down to the > problem? We have about 30 cases of this today > > Thanks in advance. > > -- > Andy Chen > Sr. Telephony Lead Engineer > achen@ <achen(a)thinkingphones.com>fuze.com > > -- > *Confidentiality Notice: The information contained in this e-mail and any > > attachments may be confidential. If you are not an intended recipient, you > > are hereby notified that any dissemination, distribution or copying of this > > e-mail is strictly prohibited. If you have received this e-mail in error, > > please notify the sender and permanently delete the e-mail and any > > attachments immediately. You should not retain, copy or use this e-mail or > > any attachment for any purpose, nor disclose all or any part of the > > contents to any other person. Thank you.* > _______________________________________________ > Kamailio (SER) - Users Mailing List > sr-users(a)lists.kamailio.org > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <achen(a)thinkingphones.com>fuze.com

-- Andy Chen Sr. Telephony Lead Engineer 415 516 5535 (M) achen@ <achen(a)thinkingphones.com>fuze.com *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.* -- Daniel-Constantin Mierlawww.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

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Alex Balashov
Andrew Chen
Daniel-Constantin Mierla