Hi, I discovered that my patch to add WAL summarization added two new SQL-callable functions but failed to document them. 0001 fixes that.
An outstanding item from the original thread was to write a better test for the not-yet-committed pg_walsummary utility. But I discovered that I couldn't do that because there were some race conditions that couldn't easily be cured. So 0002 therefore adds a new function pg_get_wal_summarizer_state() which returns various items of in-memory state related to WAL summarization. We had some brief discussion of this being desirable for other reasons; it's nice for users to be able to look at this information in case of trouble (say, if the summarizer is not keeping up). 0003 then adds the previously-proposed pg_walsummary utility, with tests that depend on 0002. 0004 attempts to fix some problems detected by Coverity and subsequent code inspection. -- Robert Haas EDB: http://www.enterprisedb.com
v1-0002-Add-new-function-pg_get_wal_summarizer_state.patch
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v1-0001-Document-WAL-summarization-information-functions.patch
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v1-0004-Repair-various-defects-in-dc212340058b4e7ecfc5a7a.patch
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v1-0003-Add-new-pg_walsummary-tool.patch
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