diff options
Diffstat (limited to 'src/include/access/heapam_xlog.h')
| -rw-r--r-- | src/include/access/heapam_xlog.h | 41 |
1 files changed, 19 insertions, 22 deletions
diff --git a/src/include/access/heapam_xlog.h b/src/include/access/heapam_xlog.h index 178d49710a5..27db48184e6 100644 --- a/src/include/access/heapam_xlog.h +++ b/src/include/access/heapam_xlog.h @@ -51,9 +51,9 @@ * these, too. */ #define XLOG_HEAP2_REWRITE 0x00 -#define XLOG_HEAP2_CLEAN 0x10 -#define XLOG_HEAP2_FREEZE_PAGE 0x20 -#define XLOG_HEAP2_CLEANUP_INFO 0x30 +#define XLOG_HEAP2_PRUNE 0x10 +#define XLOG_HEAP2_VACUUM 0x20 +#define XLOG_HEAP2_FREEZE_PAGE 0x30 #define XLOG_HEAP2_VISIBLE 0x40 #define XLOG_HEAP2_MULTI_INSERT 0x50 #define XLOG_HEAP2_LOCK_UPDATED 0x60 @@ -227,7 +227,8 @@ typedef struct xl_heap_update #define SizeOfHeapUpdate (offsetof(xl_heap_update, new_offnum) + sizeof(OffsetNumber)) /* - * This is what we need to know about vacuum page cleanup/redirect + * This is what we need to know about page pruning (both during VACUUM and + * during opportunistic pruning) * * The array of OffsetNumbers following the fixed part of the record contains: * * for each redirected item: the item offset, then the offset redirected to @@ -236,29 +237,32 @@ typedef struct xl_heap_update * The total number of OffsetNumbers is therefore 2*nredirected+ndead+nunused. * Note that nunused is not explicitly stored, but may be found by reference * to the total record length. + * + * Requires a super-exclusive lock. */ -typedef struct xl_heap_clean +typedef struct xl_heap_prune { TransactionId latestRemovedXid; uint16 nredirected; uint16 ndead; /* OFFSET NUMBERS are in the block reference 0 */ -} xl_heap_clean; +} xl_heap_prune; -#define SizeOfHeapClean (offsetof(xl_heap_clean, ndead) + sizeof(uint16)) +#define SizeOfHeapPrune (offsetof(xl_heap_prune, ndead) + sizeof(uint16)) /* - * Cleanup_info is required in some cases during a lazy VACUUM. - * Used for reporting the results of HeapTupleHeaderAdvanceLatestRemovedXid() - * see vacuumlazy.c for full explanation + * The vacuum page record is similar to the prune record, but can only mark + * already dead items as unused + * + * Used by heap vacuuming only. Does not require a super-exclusive lock. */ -typedef struct xl_heap_cleanup_info +typedef struct xl_heap_vacuum { - RelFileNode node; - TransactionId latestRemovedXid; -} xl_heap_cleanup_info; + uint16 nunused; + /* OFFSET NUMBERS are in the block reference 0 */ +} xl_heap_vacuum; -#define SizeOfHeapCleanupInfo (sizeof(xl_heap_cleanup_info)) +#define SizeOfHeapVacuum (offsetof(xl_heap_vacuum, nunused) + sizeof(uint16)) /* flags for infobits_set */ #define XLHL_XMAX_IS_MULTI 0x01 @@ -397,13 +401,6 @@ extern void heap2_desc(StringInfo buf, XLogReaderState *record); extern const char *heap2_identify(uint8 info); extern void heap_xlog_logical_rewrite(XLogReaderState *r); -extern XLogRecPtr log_heap_cleanup_info(RelFileNode rnode, - TransactionId latestRemovedXid); -extern XLogRecPtr log_heap_clean(Relation reln, Buffer buffer, - OffsetNumber *redirected, int nredirected, - OffsetNumber *nowdead, int ndead, - OffsetNumber *nowunused, int nunused, - TransactionId latestRemovedXid); extern XLogRecPtr log_heap_freeze(Relation reln, Buffer buffer, TransactionId cutoff_xid, xl_heap_freeze_tuple *tuples, int ntuples); |