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WIP remove lastScope field and deprecated implementations from SimpleObservation

blockedAn issue that's blocked on an external project changeAn issue that's blocked on an external project change

enhancementA general enhancementA general enhancement

module: micrometer-observation

performanceIssues related to general performanceIssues related to general performance

Status: Draft (not ready).

micrometer-metrics/micrometernumber 7273

#7273 In micrometer-metrics/micrometer;

· shakuzen opened on Mar 11, 2026

Add deprecation concept to meters

enhancementA general enhancementA general enhancement

module: micrometer-coreAn issue that is related to our core moduleAn issue that is related to our core module

needs: design workProgress is blocked by a need for higher level design workProgress is blocked by a need for higher level design work

Status: Open.

Feature

#7311 In micrometer-metrics/micrometer;

· shakuzen opened on Mar 19, 2026

Make inclusion of LongTaskTimer by DefaultMeterObservationHandler opt-in instead of opt-out

breaking-change

enhancementA general enhancementA general enhancement

module: micrometer-coreAn issue that is related to our core moduleAn issue that is related to our core module

Status: Open.

Feature

#7312 In micrometer-metrics/micrometer;

· shakuzen opened on Mar 19, 2026

Bump Kotlin target from 1.8 to 2.0

breaking-change

enhancementA general enhancementA general enhancement

kotlin

Status: Open.

#7338 In micrometer-metrics/micrometer;

· shakuzen opened on Mar 25, 2026

Add option for time-based FunctionCounter

blockedAn issue that's blocked on an external project changeAn issue that's blocked on an external project change

enhancementA general enhancementA general enhancement

module: micrometer-coreAn issue that is related to our core moduleAn issue that is related to our core module

Status: Draft (not ready).

micrometer-metrics/micrometernumber 7329

#7329 In micrometer-metrics/micrometer;

· shakuzen opened on Mar 24, 2026

Consider switching spin locks to ReentrantLock

module: micrometer-coreAn issue that is related to our core moduleAn issue that is related to our core module

performanceIssues related to general performanceIssues related to general performance

type: taskA general taskA general task

Status: Open.

Task

#7345 In micrometer-metrics/micrometer;

· shakuzen opened on Mar 26, 2026

Add Gauges for memory usage after GC

enhancementA general enhancementA general enhancement

instrumentationAn issue that is related to instrumenting a componentAn issue that is related to instrumenting a component

module: micrometer-coreAn issue that is related to our core moduleAn issue that is related to our core module

Status: Draft (not ready).

micrometer-metrics/micrometernumber 7296

#7296 In micrometer-metrics/micrometer;

· shakuzen opened on Mar 16, 2026

Prometheus: unnecessary allocation and validation performed on every scrape

enhancementA general enhancementA general enhancement

performanceIssues related to general performanceIssues related to general performance

registry: prometheusA Prometheus Registry related issueA Prometheus Registry related issue

Status: Open.

Feature

#7450 In micrometer-metrics/micrometer;

· m-burst opened on Apr 29, 2026

KeyValue support for Observation.Event

enhancementA general enhancementA general enhancement

module: micrometer-observation

Status: Open.

#5238 In micrometer-metrics/micrometer;

· lenin-jaganathan opened on Jul 1, 2024