[meskill]

Make sure we can pin the transaction to specific shard and the next Describe request will be routed only to this pinned shard

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[github-actions]

Bencher Report

Project	PgDog
Branch	meskill-2026-10-23-fix-parser---xmo
Testbed	Intel v1

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[github-actions]

Metal bench passed. All 150 measures within bounds.

suite	throughput	cpu/txn	user cycles/txn	user instr/txn	kernel cycles/txn	ctx/txn
pooler		28.16 (-0.1% ± 0.7%)	29,425 (+0.8% ± 1.1%)	35,782 (+0.0% ± 0.02%)	37,810 (-0.8% ± 1.2%)
lb		29.09 (+0.0% ± 0.8%)	30,699 (+0.3% ± 1.1%)	36,648 (+0.0% ± 0.02%)	38,835 (-0.2% ± 1.4%)
sharding-w2		52.46 (-0.5%)	68,833 (-0.0%)	73,022 (-0.0%)	59,165 (-2.1%)	1.404 (+0.3%)
sharding-w8	156,809 (+1.7%)	46.72 (-2.0%)	67,735 (-3.0%)	56,712 (+0.0%)	52,684 (-0.7%)	0.1462 (+2.2%)

Counters per txn

suite	br mispred	l1i refill	backend stall
pooler	82.33 (+0.9% ± 3.0%)	3,410 (+0.7% ± 0.9%)	2,480 (-0.1% ± 1.9%)
lb	85.77 (+1.0% ± 2.0%)	3,488 (+0.3% ± 1.0%)	2,654 (+0.4% ± 1.6%)
sharding-w2	314 (+0.0%)	5,498 (-0.1%)	6,529 (-2.0%)
sharding-w8	337 (+1.8%)	5,203 (-0.0%)	8,704 (-9.2%)

Microbench: all 135 measures within bounds.

• simple_cold: 13 of 15 benches slower, median +1.3% ± 0.5%

lb flamegraph vs f5632bc

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microbench flamegraph vs f5632bc

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pooler flamegraph vs f5632bc

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sharding-w2 flamegraph vs f5632bc

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sharding-w8 flamegraph vs f5632bc

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Logs

lb, microbench, pooler, sharding-w2, sharding-w8, verdict.json

Compared d3d3ace with f5632bc.