> I have a requirement to index (mainly updation) 700 docs per second. > Suppose I have a 128GB RAM, 32 CPU machine, with each doc size around 260 > byes (6 fields out of which only 2 will undergo updation at the above > rate). This collection has around 122Million docs and that count is pretty > much a constant.
We've found that average index size per document is a good predictor of performance. For instance, I've got a 150GB index lying around, containing 400M documents. That's roughly 400 bytes per document in index size. This was indexed @ 4500 documents/second. If the average index size per documents doubles, the throughput will go down by about a third. Your mileage may vary. But yeah, I would say that 700 docs on your machine won't be much of a problem. Especially considering your index will likely fit in memory. - Bram
