Lately we are seeing latency spikes in production for our queries. We also see
a spike in the number of open search contexts ( it shoots to around 2000 from 400 ). We are using
ES 1.3.9 and it recovers on its own after about 5 minutes. There are no scan/scrolls being used,
so its surprising to see a spike in open search contexts...any clues on why this may be happening?