| POOL_MAX | Maximum number of processes that this instance of ISYS should keep pooled. |
| POOL_MIN | Minimum number of processes that this instance of ISYS should keep pooled. |
| POOL_TIMEOUT | Amount of time (in milliseconds) to wait for a pooled worker process to become available before creating a temporary one. |
| POOL_KEEPALIVE | The amount of time (in milliseconds) to keep a unused worker process in the pool before releasing it. |
| RESULTLIST_PATH | The folder to store the temporary result lists. |
| RESULTLIST_TIMEOUT | The number if hours that a temporary result list should be kept for. |
| RESULTLIST_TYPE | Specifies how result list ids are allocated. 0 for sequential numeric ids; 1 for non-sequential random ids (GUID). |
| RESULTLIST_SECURE | Indicates that the result list should be secured so that only the search user has access. Only applicable when used on a secure website. |
| LOG_PATH | The path to store any generated log files. |