Calculate pages checksum in the WAL redo loop

neondatabase · May 9, 2022 · 9dc2dec · 9dc2dec
1 parent 9a9459a
commit 9dc2dec
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diff --git a/contrib/zenith/pagestore_smgr.c b/contrib/zenith/pagestore_smgr.c
@@ -437,6 +437,9 @@ PageIsEmptyHeapPage(char *buffer)
 
 	PageInit((Page) empty_page.data, BLCKSZ, 0);
 
+	/* Ignore checksum when comparing empty pages */
+	((PageHeader)empty_page.data)->pd_checksum = ((PageHeader)buffer)->pd_checksum;
+
 	return memcmp(buffer, empty_page.data, BLCKSZ) == 0;
 }
 

diff --git a/src/backend/tcop/zenith_wal_redo.c b/src/backend/tcop/zenith_wal_redo.c
@@ -719,6 +719,9 @@ GetPage(StringInfo input_message)
 	page = BufferGetPage(buf);
 	/* single thread, so don't bother locking the page */
 
+	/* Calculate checksums on the newly materialized page if needed. */
+	PageSetChecksumInplace(page, blknum);
+
 	/* Response: Page content */
 	tot_written = 0;
 	do {