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From the monitoring data, the pool is capable for higher traffic.

Bug: 997376
Change-Id: I557a7de4b7eed461b31941661c56265004263cb7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2340187
Auto-Submit: Haiyang Pan <hypan@google.com>
Reviewed-by: Erik Staab <estaab@chromium.org>
Commit-Queue: Erik Staab <estaab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795553}