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wme: Set ReadingDepth sampling rate to 0.1%

Authored by phuedx on Feb 27 2017, 9:13 AM.

Description

wme: Set ReadingDepth sampling rate to 0.1%

The current sampling rate, 0.5% (the default), results in a peak rate of
~2500 events/minute [0].

Since the ReadingDepth instrumentation will remain active while it's
being fully defined and vetted [1], reduce the sampling rate to 0.1% to
reduce the load on the EventLogging pipeline but still log a
statistically significant number of events.

N.B. The sampling rate for the NavigationTiming instrumentation is 0.1%
[2].

[0] https://grafana.wikimedia.org/dashboard/db/eventlogging-schema?var-schema=ReadingDepth&from=1487808000000&to=1487980799999
[1] https://phabricator.wikimedia.org/T155639#3046288
[2] https://phabricator.wikimedia.org/rOMWC965747fa07afcde2da014f24a16b774b9ce78795

Bug: T155639
Change-Id: I37d4b11f8a4691984364c72e6fa5799782e179f5

Details

Committed
hasharFeb 27 2017, 10:20 AM
Parents
rOMWC14874b483a58: mariadb: Depool db1045 for maintenance
Branches
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Tags
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ChangeId
I37d4b11f8a4691984364c72e6fa5799782e179f5