Snowflake connectivity issues
In case there is a problem with connections to Snowflake, there is a known issue about default ResultSet format used by JDBC Snowflake driver (Arrow).
The fix would be modified the JDBC connection url, adding "&jdbc_query_result_format=json" at the end of the url.
"jdbc:snowflake://<server>.snowflakecomputing.com/?db=<data_base>&schema=<schema>&warehouse=<warehouse>&role=<role>&jdbc_query_result_format=json"
For crawl related issues and troubleshooting, please check the connectors general troubleshooting page.
The Database Server connector does not have any major consideration regarding throttling.