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authorHeikki Linnakangas <heikki.linnakangas@iki.fi>2021-06-16 12:34:32 +0300
committerHeikki Linnakangas <heikki.linnakangas@iki.fi>2021-06-16 12:37:13 +0300
commitf98635ad6295ad142779756e60325a8e7f825909 (patch)
treefe0e04f5727808cdb4057a58e4aee5b1a66e2f5a /src
parentfb3d6b0e1aa41518857ff12534bef49503ce7575 (diff)
downloadpostgresql-f98635ad6295ad142779756e60325a8e7f825909.tar.gz
postgresql-f98635ad6295ad142779756e60325a8e7f825909.zip
Fix outdated comment that talked about seek position of WAL file.
Since commit c24dcd0cfd, we have been using pg_pread() to read the WAL file, which doesn't change the seek position (unless we fall back to the implementation in src/port/pread.c). Update comment accordingly. Backpatch-through: 12, where we started to use pg_pread()
Diffstat (limited to 'src')
-rw-r--r--src/backend/access/transam/xlog.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index e52e805708b..67dcd1e126d 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -785,11 +785,9 @@ static XLogSegNo openLogSegNo = 0;
/*
* These variables are used similarly to the ones above, but for reading
- * the XLOG. Note, however, that readOff generally represents the offset
- * of the page just read, not the seek position of the FD itself, which
- * will be just past that page. readLen indicates how much of the current
- * page has been read into readBuf, and readSource indicates where we got
- * the currently open file from.
+ * the XLOG. readOff is the offset of the page just read, readLen
+ * indicates how much of it has been read into readBuf, and readSource
+ * indicates where we got the currently open file from.
*/
static int readFile = -1;
static XLogSegNo readSegNo = 0;