Update cheatsheets

tldr/pg_waldump

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pg_waldump
+
+> Display a human-readable rendering of the write-ahead log (WAL).
+> More information: <https://www.postgresql.org/docs/current/pgwaldump.html>.
+
+- Basic invocation reading a WAL segment (or range):
+
+`pg_waldump {{start_segment}} {{end_segment}}`
+
+- Specify the WAL file directory:
+
+`pg_waldump {{start_segment}} {{end_segment}} {{[-p|--path]}} {{path}}`
+
+- Start from a particular WAL location (LSN):
+
+`pg_waldump {{start_segment}} {{end_segment}} {{[-s|--start]}} {{lsn}}`
+
+- Stop at a particular WAL location (LSN):
+
+`pg_waldump {{start_segment}} {{end_segment}} {{[-e|--end]}} {{lsn}}`
+
+- Follow new WAL entries as they arrive:
+
+`pg_waldump {{start_segment}} {{end_segment}} {{[-f|--follow]}}`
+
+- Limit number of records shown:
+
+`pg_waldump {{start_segment}} {{end_segment}} {{[-n|--limit]}} {{count}}`
+
+- Quiet mode (suppress output except errors):
+
+`pg_waldump {{start_segment}} {{end_segment}} {{[-q|--quiet]}}`
+
+- Filter by resource manager:
+
+`pg_waldump {{start_segment}} {{end_segment}} {{[-r|--rmgr]}} {{rmgr_name}}`