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Include previous TLI in end-of-recovery and shutdown checkpoint records.

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This isn't used for anything but a sanity check at the moment, but it could
be highly valuable for debugging purposes. It could also be used to recreate
timeline history by traversing WAL, which seems useful.
This commit is contained in:
Heikki Linnakangas
2013-02-11 18:13:09 +02:00
parent c352ea2d74
commit 7803e9327d
6 changed files with 48 additions and 8 deletions
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3
src/include/access/xlog_internal.h
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@@ -221,7 +221,8 @@ typedef struct xl_restore_point
typedef struct xl_end_of_recovery
{
TimestampTz end_time;
TimeLineID ThisTimeLineID;
TimeLineID ThisTimeLineID; /* new TLI */
TimeLineID PrevTimeLineID; /* previous TLI we forked off from */
} xl_end_of_recovery;
/*

4
src/include/catalog/pg_control.h
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@@ -21,7 +21,7 @@
/* Version identifier for this pg_control format */
#define PG_CONTROL_VERSION 933
#define PG_CONTROL_VERSION 934
/*
* Body of CheckPoint XLOG records. This is declared here because we keep
@@ -33,6 +33,8 @@ typedef struct CheckPoint
XLogRecPtr redo; /* next RecPtr available when we began to
* create CheckPoint (i.e. REDO start point) */
TimeLineID ThisTimeLineID; /* current TLI */
TimeLineID PrevTimeLineID; /* previous TLI, if this record begins a new
* timeline (equals ThisTimeLineID otherwise) */
bool fullPageWrites; /* current full_page_writes */
uint32 nextXidEpoch; /* higher-order bits of nextXid */
TransactionId nextXid; /* next free XID */