Don't forget to flush XLOG_PARAMETER_CHANGE record.

Backpatch to 9.0 where XLOG_PARAMETER_CHANGE record was instroduced.

diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 15e0c01b59d3668408f7e141270885fff57a27e7..e245aa6ef8a9ba0dac6b89519c428bd447a1fe34 100644 (file)
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -8803,6 +8803,7 @@ XLogReportParameters(void)
        {
            XLogRecData rdata;
            xl_parameter_change xlrec;
+           XLogRecPtr  recptr;
 
            xlrec.MaxConnections = MaxConnections;
            xlrec.max_prepared_xacts = max_prepared_xacts;
@@ -8814,7 +8815,8 @@ XLogReportParameters(void)
            rdata.len = sizeof(xlrec);
            rdata.next = NULL;
 
-           XLogInsert(RM_XLOG_ID, XLOG_PARAMETER_CHANGE, &rdata);
+           recptr = XLogInsert(RM_XLOG_ID, XLOG_PARAMETER_CHANGE, &rdata);
+           XLogFlush(recptr);
        }
 
        ControlFile->MaxConnections = MaxConnections;