With the latest release 2018.1 NetSuite started enforcing the concurrence for some customers but by 2018.2 NetSuite started enforcing the concurrence on all customers.

• Integrations (REST/WebService) that connect to NetSuite database to grab data will use a default limit of 5 concurrent (simultaneous) connections.
• This number is shared for all integrations within your NetSuite System/Node.
• If you have one integration that needs 2 concurrent connections, there will be 3 concurrent connections left for other integrations until the first two are closed.
• If you have too many integrations running you will get an error on one or more integrations stating, you have exceeded the allotted 5 concurrent connections.

• Monitor your integrations with NetSuite Concurrency Monitor
• Schedule integrations to run when other integrations are not running
• Write/Rewrite your integrations to not need as many connections
• Purchase SuiteCloud Plus (SCP) License to increase your limit

• The monitor dashboard allows you to view and plan the scheduling of your integrations.
  • The dashboard will outline your connections
    • Average Concurrency
    • Peak Concurrency
    • Total Exceeded Concurrency
    • Highest Exceeded Concurrency
    • Concurrency Limit
  • Within this tool you will see days and times that integrations run to help you to better schedule when integrations should run.
• This monitor can be a beneficial tool to determine if you need to get the SCP license.

• Log into NetSuite as an administrator or a role that allows you to search/install bundles
• Using the "Customization" menu, find "SuiteBuilder" then click on "Search & Install Bundles"

Use "67350" or keyword "APM" to search for the bundle

• Click on "Application Performance Management"
• Click on the "Install" button, you will get a prompt like below.

• After you click on the "OK" button of this prompt you will get a NetSuite legal disclaimer to read and agree/disagree to. (If you disagree you will not be able to install the bundle)
• A copy of this NetSuite legal disclaimer is attached below. (NOTE: The live document may change at any time, this is just a copy as of the date of this post.)
• Please read the live document before you agree to it

• Once the bundle is installed you can get to the monitor using the "Customization" menu, find "Performance" then click on "Concurrency Monitor"
• If you look at the examples below they show a time line of when scripts have ran.
  • First image is all ETLs within the limit
  • Second image is all ETLs exceeding the limit

• By default, all accounts have a concurrent connection limit of 5, with this license your limit increases to 15.
• If needed you can purchase additional SuiteCloud Plus licenses to increase your concurrency in increments of 15 though the monitor of your integrations should be attempted first.

1. “Monitoring Web Services and RESTlet Concurrency.” Oracle NetSuite - SuiteAnswers, Oracle NetSuite, 24 May 2018, 11:32 PM, netsuite.custhelp.com/app/answers/detail/a_id/74068/kw/74068.
2. “APM SuiteApp: How to Monitor Your Account Concurrency Usage.” YouTube, Oracle Learning Library, 2 May 2018, www.youtube.com/watch?time_continue=12&v=vkE4HoiQAv8.