I have been getting intermittent 500 errors while batch-uploading simple row data to Google Fusion Tables via the v2 API, using the importRows method.
We have tried throttling and backing off, but the patterns seem to indicate that we are going over quota even with small numbers of requests and fairly slow rates.
I can see in the API console it's limited to 200 requests / 100s (as confirmed in other posts it's a 0.5/s rate limit).
We are about to sadly abandon the Fusion Tables API and rebuild the entire project using something else, due to the unpredictable nature of the 500 errors. (Sometimes insert happens but sometimes not, after an error is returned which makes retrying run the risk of duplicate inserts).
It occurred to me that as we are uploading 1,000 rows per request, does this count as 1,000 requests?