Unblocking #19
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Unblocking #19
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Owner
lukashes
commented
Nov 26, 2025
lukashes
commented
Instead of blocking on flush() after every batch, now flush once per 10 seconds: - Track pending LSN and last flush time in processor state - poll() triggers network I/O without blocking - flush() + LSN commit happen every 10 seconds - Final flush on graceful shutdown ensures delivery This should significantly improve throughput by letting librdkafka batch messages better.
Fixes PostgreSQL connection drops by sending LSN feedback every 10 seconds. Matches Debezium's approach (status.update.interval.ms default). Main changes: - Background worker for flush/commit (every 10s) - Atomic pending_lsn for thread-safe LSN tracking - Remove sync flush from main processing loop
Simplified background flush logic with early returns. Moved flush interval to constants.CDC for better configurability. Skip sending feedback when LSN is uninitialized (0).
Async flush/commit improved throughput from 85k to 105k events/sec. Now at 70% of Debezium's throughput with <10 MB memory footprint.
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