KB83727
Published: June 25, 2014
Revision: 1.0

Nagle's algorithm is enabled in PAC Control TCP/IP communication handles


Applies To:

SNAP-PAC-S1
SNAP-PAC-S1-W
SNAP-PAC-S1-FM
SNAP-PAC-S2
SNAP-PAC-S2-W
SNAP-PAC-R1
SNAP-PAC-R1-W
SNAP-PAC-R1-FM
SNAP-PAC-R2
SNAP-PAC-R2-W
SNAP-PAC-R2-FM

Versions Affected:

Versions affected: R9.1a - R9.3e
Problem is fixed in version: R9.4a

Resolved In Version:

Problem is fixed in version: R9.4a


Symptoms:

When using a TCP/IP communication handle that only transmits data, you may see either delayed transmission of data or bursts of queued data. This indicates that Nagle's algorithm is enabled in the PAC control engine's TCP/IP communication handles.

Nagle's algorithm is enabled automatically and it cannot be disabled in PAC Control. While it is not useful in PAC Control, in a very slow network environment it ensures that data is transmitted in an orderly fashion by combining small outgoing messages and sending them all at once.


Resolution:

Opto 22 has resolved this issue.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


DISCLAIMER

This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.

OPTO 22 DOES NOT WARRANT THE COMPLETENESS, TIMELINESS, OR ACCURACY OF THE DATA CONTAINED IN THIS OPTOKB ARTICLE AND MAY MAKE CHANGES THERETO AT ANY TIME AT ITS SOLE DISCRETION WITHOUT NOTICE. FURTHER, ALL INFORMATION CONVEYED HEREBY IS PROVIDED TO USERS 'AS IS.' IN NO EVENT SHALL OPTO 22 BE LIABLE FOR ANY DAMAGES OF ANY KIND INCLUDING DIRECT, INDIRECT INCIDENTAL, CONSEQUENTIAL, LOSS PROFIT, OR DAMAGE, EVEN IF OPTO 22 HAS BEEN ADVISED ON THE POSSIBILITY OF SUCH DAMAGES.

OPTO 22 DISCLAIMS ALL WARRANTIES WHETHER EXPRESSED OR IMPLIED WITH RESPECT TO THE INFORMATION (INCLUDING HARDWARE, SOFTWARE, AND/OR FIRMWARE) PROVIDED HEREBY, INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTIBILITY, AND NON-INFRINGEMENT. Note that certain jurisdictions do not sanction the exclusion of implied warranties: thus, this disclaimer may not apply to you.

Copyright © 2019 Opto 22. All rights reserved.