Answer
Autovacuum tuning prevents bloat, avoids XID wraparound, and keeps index efficiency high. Parameters like scale factors, cost delay, and worker count are critical.
Quick Answer
Autovacuum tuning matters because: dead tuple bloat slows queries (more pages to scan), XID wraparound causes catastrophic failure, stale statistics cause bad query plans. Key params: autovacuum_vacuum_scale_factor (default 0.2 = vacuum after 20% rows change - too high for large tables), autovacuum_vacuum_cost_delay (throttles I/O impact). Set lower scale factors for large, high-write tables with per-table storage params.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ