Increase max instances and concurrent requests, threadsafe.
Increase max instances and concurrent requests, threadsafe.

Based on usage data on a 50% experiment, 50 instances is not enough to
handle 100% traffic. Updating to 150 (which is closer to historical
peaks) and increasing max request concurrency to 80.

We also want to enable threadsafe to let individual instances handle
more than a single request at a time.

R=490a224d89645d3fea983d7189ce51bde0a00c1d@chromium.org

Bug: chromium:917914
Change-Id: I9fb3b32166015092d78d200b0b6d020874a8e024
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/1518115
Reviewed-by: Simon Hatch <490a224d89645d3fea983d7189ce51bde0a00c1d@chromium.org>
Commit-Queue: Dean Berris <34a37f59e4ade3cf49221306f04217acf3e86255@chromium.org>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult