Emit pool metrics and traces, and fix Count semantics in ChannelDbConnectionPool - #4504

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mdaigle wants to merge 20 commits into

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dev/automation/channel-pool-v2-followups

Commits on Aug 12, 2026

Emit pool metrics and fix Count semantics in ChannelDbConnectionPool

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018196a
Add pool tracing parity for ChannelDbConnectionPool

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6d7710d
Give connection pools an injectable metrics sink

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6f0261c

Commits on Aug 13, 2026

Define the pool metrics seam as an interface

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787823b
Remove trace-message parity tests

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2a0ed09
Fix trace-message class/method references in pool V2

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efd55a0
Adopt new trace message format in pool V2

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c63d491
Simplify pool V2 trace call sites

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56731d2
Add missing coverage traces for warmup and connection retrieval

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2e0dcf9
Feed connection metrics through DbConnectionInternal's constructor

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a005f3c
Avoid duplicating base constructor defaults; drop dead pool helper

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21644e4
Clean up test file structure.
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a970bdd

Commits on Aug 14, 2026

Balance soft and hard disconnects when replacing a connection

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14dbff1
Balance the pooled-connection gauge when replacing a connection

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563543e
Address review feedback on metrics routing, sizing, and shared traces

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389d934
Balance connection counters when activation fails

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d36665e
Add coverage for the counters emitted when idle connections are pruned

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37307b8
Keep the new trace format in PoolPruner

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b8ec7a3
Add unit coverage for the stasis connection counter

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c9dfe1c
Merge branch 'main' of https://github.com/dotnet/SqlClient into dev/automation/channel-pool-v2-followups
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53dd42c