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Add FAQ entry for MADV settings in older versions #23429

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Jan 25, 2021
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Add FAQ entry for MADV settings in older versions #23429

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bd926f3
add FAQ entry for MADV settings in older versions
fearful-symmetry Jan 11, 2021
52d6dbc
add changelog
fearful-symmetry Jan 12, 2021
f20f985
finish sentence
fearful-symmetry Jan 12, 2021
b6c999b
Merge remote-tracking branch 'upstream/master' into madv-rss-usage-kn…
fearful-symmetry Jan 12, 2021
83524b6
Merge remote-tracking branch 'upstream/master' into madv-rss-usage-kn…
fearful-symmetry Jan 14, 2021
4caaca6
Update libbeat/docs/shared-faq.asciidoc
fearful-symmetry Jan 15, 2021
ca02019
Update libbeat/docs/shared-faq.asciidoc
fearful-symmetry Jan 15, 2021
0c86801
Update libbeat/docs/shared-faq.asciidoc
fearful-symmetry Jan 15, 2021
b3480dc
Merge remote-tracking branch 'upstream/master' into madv-rss-usage-kn…
fearful-symmetry Jan 19, 2021
97f29c0
Merge branch 'madv-rss-usage-known-issue' of github.com:fearful-symme…
fearful-symmetry Jan 19, 2021
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1 change: 1 addition & 0 deletions CHANGELOG.next.asciidoc
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Expand Up @@ -230,6 +230,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
- Fix typo in config docs {pull}23185[23185]
- Fix `nested` subfield handling in generated Elasticsearch templates. {issue}23178[23178] {pull}23183[23183]
- Fix CPU usage metrics on VMs with dynamic CPU config {pull}23154[23154]
- Add FAQ entry for madvdontneed variable {pull}23429[23429]
- Fix panic due to unhandled DeletedFinalStateUnknown in k8s OnDelete {pull}23419[23419]
- Fix error loop with runaway CPU use when the Kafka output encounters some connection errors {pull}23484[23484]

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7 changes: 7 additions & 0 deletions libbeat/docs/shared-faq.asciidoc
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Expand Up @@ -206,3 +206,10 @@ to +{beatname_lc}-customname-*+.
For more information, see {kibana-ref}/index-patterns.html[Creating an index
pattern] in the {kib} docs.
endif::no_dashboards[]

[[madvdontneed-rss]]
=== High RSS memory usage due to MADV settings

In versions of {beatname_uc} prior to 7.10.2, the go runtime defaults to `MADV_FREE` by default.
In some cases, this can lead to high RSS memory usage while the kernel waits to reclaim any pages assigned to {beatname_uc}.
On versions prior to 7.10.2, set the `GODEBUG="madvdontneed=1"` environment variable if you run into RSS usage issues.