[v26.1.x] config/tx: have reasonable defaults for idempotency/tx configurations.#30083
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bharathv merged 1 commit intoredpanda-data:v26.1.xfrom Apr 9, 2026
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max_concurrent_producer_ids: old: int64_max new: 100k max_transactions_per_coordinator: old: int64_max new: 10k Neither of these changes have correctness implications. Compared to defaults, they evict unused producers more aggressively. The new defaults are also pretty generous and probably cover most usecases. Even if a usage falls outside these defaults, worst that could happen is old producers get evicted to make room for new producers, so the old producer may have to reinit incase of transactions and most clients are already equipped to do that and it is fully transparent to idempotent producers. On the flip side, this avoids accumulation of a ton of producers in snapshots and such. Upgrade considerations: if there is a non default value set, nothing changes (eg: cloud). If there was no value set, the brokers pick up the new default and may do a bunch of evictions if there are many historical producers accumulated (which is rare in most applications). (cherry picked from commit 7330b45)
bharathv
approved these changes
Apr 9, 2026
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Backport of PR #30058