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GetWALRecordsInfo() and pg_get_wal_fpi_info() can leak memory across WAL record iterations. Fix this by using a temporary memory context that's reset for each WAL record iteraion. Also a use temporary context for loops in GetXLogSummaryStats(). The number of iterations is a small constant, so the previous behavior was not a leak, but fix for clarity (but no need to backport). Backport GetWALRecordsInfo() change to version 15. pg_get_wal_fpi_info() didn't exist in version 15. Reported-by: Peter Geoghegan Author: Bharath Rupireddy Discussion: https://www.postgresql.org/message-id/CAH2-WznLEJjn7ghmKOABOEZYuJvkTk%3DGKU3m0%2B-XBAH%2BerPiJQ%40mail.gmail.com Backpatch-through: 15