memory-observability-secondary-index-idle-map.md

Memory Observability: Secondary Index Idle Map

This counter tracks stream cardinality in the secondary-index idle-tracking map.

Observability name:

• tieredstore.mem.leak_candidate.secondary_index.stream_idle_ticks_streams

Where implemented:

• src/app_core.ts:603 maps this counter.
• src/app.ts:258 publishes runtime count into memory subsystem counts.
• src/index/secondary_indexer.ts:194-215 exposes streamIdleTickEntries via getMemoryStats().

State source lines:

• src/index/secondary_indexer.ts:75 streamIdleTicks map declaration.