2026436 - Remove or update probes expiring at the end of Firefox 151: MEMORY_PHC_SLOTS_* before Gecko version gets increased to 152 on 2026-04-20

Status: RESOLVED FIXED

(Core :: Memory Allocator, task)

Description

[telemetry-probes]

The following Firefox probes will expire at the end of Firefox nightly release: version 151 [1].

MEMORY_PHC_SLOP
MEMORY_PHC_SLOTS_ALLOCATED
MEMORY_PHC_SLOTS_FREED

What to do about this:

1. If one, some, or all of the metrics are no longer needed, please remove them from their definitions files (Histograms.json, Scalars.yaml, Events.yaml).
2. If one, some, or all of the metrics are still required, please submit a patch to extend their expiry.

If you have any problems, please ask for help on the #data-help Slack channel or the #telemetry Matrix room at https://chat.mozilla.org/#/room/#telemetry:mozilla.org. We'll give you a hand.

Your Friendly, Neighborhood Telemetry Team

[1] https://wiki.mozilla.org/Release_Management/Calendar

This is an automated message sent from probe-scraper. See https://github.com/mozilla/probe-scraper for details.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The bug is marked as tracked for firefox151 (nightly). However, the bug still isn't assigned.

:jstutte, could you please find an assignee for this tracked bug? If you disagree with the tracking decision, please talk with the release managers.

For more information, please visit BugBot documentation.

Comment 2

[Paul Bone [:pbone]]

Simon, these are the same but using the older telemetry system I think. See Bug 2026442.

Comment 3

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Reminder: The bug needs to be fixed this week.

Comment 4

[Simon Friedberger [:simonf]]

Attachment: Bug 2026436: Update probe expiry for PHC r=pbone

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/d64bd4e4239d
https://hg.mozilla.org/integration/autoland/rev/3c700bd5480e
Update probe expiry for PHC r=chutten

Comment 6

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/3c700bd5480e