If you read the Understanding Web Services Governance help topic, there is a limit on the number of records in the request and NOT on the number of add operations themselves
As clearly stated
The record limits indicated in the following tables are equal to the query basis. There is NO limit to the number of requests that can be sent over a certain period of time, only by the number of records sent to an individual request.
You can always run another query with the following set of 400 queries. If you are concerned that requests take time and you really want to open parallel / parallel requests, there are two options:
(1) you buy a SuiteCloud Plus license, which will increase the number of concurrent requests, allowing multiple simultaneous users 10-30 (depending on the number of SuiteCloud licenses that you can buy)
(2) Use RESTlet APIs, which allow about 10 concurrent requests per user session, but writing a SuiteScript package to a NetSuite account requires access to it through Https as web services.
If it bothers you -
is there a way to increase the limit on the number of records per operation / request
No answer
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