Analysis of how 8 parameters in the control file are synchronized to the standby via PARAMETER_CHANGE WAL records, and the impact of wal_log_hints primary-standby mismatch on pg_rewind
Analyzing the trigger conditions for VACUUM truncation of trailing empty pages, diving into the should_attempt_truncation function source code and the REL_TRUNCATE_MINIMUM threshold.
Analysis of PostgreSQL's mechanism for initializing the data dictionary via BKI files in bootstrap mode, answering how basic system tables are accessed when pg_class doesn't exist yet
Analyzes why a unique index scan accesses multiple data pages due to broken HOT chains and index bloat, diving deep into btree index version management and dead tuple cleanup mechanisms.
Comprehensive analysis of PostgreSQL TRUNCATE command options, including ONLY inheritance behavior, RESTART/CONTINUE IDENTITY sequence reset, and CASCADE behavior