Store Content in IDOL Server > Configure Content Storage > Stored Content > Disable Content Storage

Disable Content Storage
You can disable content storage if you do not require IDOL server to return the content of fields or summaries with results. This option saves the memory that the storing of fields normally requires.
To disable content storage, set NodeTableStoreContent in the IDOL server configuration file [Server] section to false.
If you disable content storage, it affects the performance of the following actions.