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d96f87332b
Instead of emitting a separate WAL XLOG_HEAP2_VISIBLE record for setting bits in the VM, specify the VM block changes in the XLOG_HEAP2_MULTI_INSERT record. This halves the number of WAL records emitted by COPY FREEZE. Author: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Robert Haas <robertmhaas@gmail.com> Reviewed-by: Kirill Reshke <reshkekirill@gmail.com> Discussion: https://postgr.es/m/flat/CAAKRu_ZMw6Npd_qm2KM%2BFwQ3cMOMx1Dh3VMhp8-V7SOLxdK9-g%40mail.gmail.com
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* visibilitymap.h
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* visibility map interface
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*
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*
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* Portions Copyright (c) 2007-2025, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/access/visibilitymap.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef VISIBILITYMAP_H
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#define VISIBILITYMAP_H
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#include "access/visibilitymapdefs.h"
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#include "access/xlogdefs.h"
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#include "storage/block.h"
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#include "storage/buf.h"
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#include "storage/relfilelocator.h"
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#include "utils/relcache.h"
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/* Macros for visibilitymap test */
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#define VM_ALL_VISIBLE(r, b, v) \
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((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_VISIBLE) != 0)
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#define VM_ALL_FROZEN(r, b, v) \
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((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_FROZEN) != 0)
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extern bool visibilitymap_clear(Relation rel, BlockNumber heapBlk,
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Buffer vmbuf, uint8 flags);
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extern void visibilitymap_pin(Relation rel, BlockNumber heapBlk,
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Buffer *vmbuf);
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extern bool visibilitymap_pin_ok(BlockNumber heapBlk, Buffer vmbuf);
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extern uint8 visibilitymap_set(Relation rel,
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BlockNumber heapBlk, Buffer heapBuf,
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XLogRecPtr recptr,
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Buffer vmBuf,
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TransactionId cutoff_xid,
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uint8 flags);
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extern uint8 visibilitymap_set_vmbits(BlockNumber heapBlk,
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Buffer vmBuf, uint8 flags,
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const RelFileLocator rlocator);
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extern uint8 visibilitymap_get_status(Relation rel, BlockNumber heapBlk, Buffer *vmbuf);
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extern void visibilitymap_count(Relation rel, BlockNumber *all_visible, BlockNumber *all_frozen);
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extern BlockNumber visibilitymap_prepare_truncate(Relation rel,
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BlockNumber nheapblocks);
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#endif /* VISIBILITYMAP_H */
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