When i check the code lucene/core DocumentsWriter.preUpdate code. I see the flushControl is used when thread is Stalled. When we have a lot of documents write into disk which is SSD. We monitored that the thread is all in flush, and request continuously use addDocument which can go into preUpdate check, it make more flush request into IO queue. As this situation, it make all request blocked, and disk util is no full of usage. So may be this optimization can take more condition into consideration?
Thanks & Best Regards Yuncheng Lu
