Instrument usage stack v10 alt#44

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lfittl wants to merge 9 commits intomasterfrom

instrument-usage-stack-v10-alt

Commits on Mar 20, 2026

instrumentation: Separate trigger logic from other uses
lfittl
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instrumentation: Separate per-node logic from other uses
lfittl
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instrumentation: Replace direct changes of pgBufferUsage/pgWalUsage with INSTR_* macros
lfittl
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instrumentation: Add additional regression tests covering buffer usage
lfittl
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Optimize measuring WAL/buffer usage through stack-based instrumentation
lfittl
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instrumentation: Use Instrumentation struct for parallel workers
lfittl
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instrumentation: Optimize ExecProcNodeInstr instructions by inlining
lfittl
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Index scans: Show table buffer accesses separately in EXPLAIN ANALYZE
lfittl
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Add pg_session_buffer_usage contrib module
lfittl
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