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[Docs] Add observability:apmMaxNumberOfServices advanced setting - #303145

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@alexandra5000 alexandra5000 commented Nov 4, 2026 •

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Summary

Adds observability:apmMaxNumberOfServices to the Kibana advanced settings reference, next to its sibling observability:apmServiceGroupMaxNumberOfServices.

The setting was introduced in #293939 and caps how many services the APM Service inventory returns: default 1000, maximum 5000. docs/reference/advanced-settings-space.yml is hand-maintained and that PR didn't touch it, so the setting is currently missing from the reference.

Closes elastic/docs-content#8694

Checklist

  • The correct release_note:* type label (or release_note:skip) is applied
  • Review the backport guidelines and apply applicable backport:* labels

Docs-only change to a hand-maintained reference file; no code, tests, or APIs affected.

🤖 Generated with Claude Code

… to set the maximum number of services displayed in the APM Service inventory
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@alexandra5000 alexandra5000 added release_note:skip Skip the PR/issue when compiling release notes docs backport:version Backport to applied version labels v9.6.0 v9.7.0 labels Nov 4, 2026
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@jennypavlova jennypavlova left a comment

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LGTM 🚀

- setting: "observability:apmMaxNumberOfServices"
id: observability-apm-max-number-of-services
description: |
Sets the maximum number of services shown in the {{product.apm}} Service inventory. Values must be between 1 and 5000. Higher values slow down queries and use more memory on {{es}}. Above 2000 the query can exceed the `search.max_buckets` cluster setting, which defaults to 65536.

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Suggested change
Sets the maximum number of services shown in the {{product.apm}} Service inventory. Values must be between 1 and 5000. Higher values slow down queries and use more memory on {{es}}. Above 2000 the query can exceed the `search.max_buckets` cluster setting, which defaults to 65536.
Sets the maximum number of services shown in the {{product.apm}} Service inventory. Values must be between 1 and 5000. Higher values slow down queries and use more memory on {{es}}. Above 2000, the query can exceed the `search.max_buckets` cluster setting, which defaults to 65536.

if possible, add a link to that cluster setting. The relationship between these 2 isn't super obvious

@florent-leborgne florent-leborgne left a comment

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see my comment but otherwise LGTM

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backport:version Backport to applied version labels docs release_note:skip Skip the PR/issue when compiling release notes v9.6.0 v9.7.0

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Raise the maximum number of services shown in the APM Services inventory

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