Index monitor slowing down index scans

Avg. Query Throughput (queries/sec), CI19, Composite Filters (1000 -> 1), Covered, MOI, not_bounded

1593 - https://perf.jenkins.couchbase.com/job/iris-multi-client/12799/ - 59501.0
1594 - https://perf.jenkins.couchbase.com/job/iris-multi-client/12802/ - 37752.0

http://changelog.build.couchbase.com/?product=couchbase-server&fromVersion=7.1.0&fromBuild=1593&toVersion=7.1.0&toBuild=1594&f_goxdcr=on&f_ns_server=on&f_product-metadata=on

http://cbmonitor.sc.couchbase.com/reports/html/?snapshot=iris_710-1593_access_4fff&snapshot=iris_710-1594_access_5f5e

http://showfast.sc.couchbase.com/#/timeline/Linux/n1ql/API2/MOI

Many tests that push indexer cpu utilization to the max have regressed in 1594. It seems the only related commits are from the introduction of index monitor and indexer autofailover. It looks like default timeout for the monitor request is 2 seconds which may be too low for heavy indexer usage. In the logs you can see lots of these monitor requests failing

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-iris-multi-client-12802/172.23.100.45.zip <---indexer
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-iris-multi-client-12802/172.23.100.55.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-iris-multi-client-12802/172.23.100.70.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-iris-multi-client-12802/172.23.100.71.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-iris-multi-client-12802/172.23.100.72.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-iris-multi-client-12802/172.23.100.73.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-iris-multi-client-12802/172.23.100.9.zip

If there is a way to increase the timeout, I can try that to see if there is less slow down. Also would like to disable indexer autofailover if possible. Can you provide the endpoints and requests to do so?