bulk_write.h File Reference

#include "storage/smgr.h"
#include "utils/rel.h"

Include dependency graph for bulk_write.h:

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Typedefs
typedef struct BulkWriteState	BulkWriteState
typedef PGIOAlignedBlock *	BulkWriteBuffer

Functions
BulkWriteState *	smgr_bulk_start_rel (Relation rel, ForkNumber forknum)
BulkWriteState *	smgr_bulk_start_smgr (struct SMgrRelationData *smgr, ForkNumber forknum, bool use_wal)
BulkWriteBuffer	smgr_bulk_get_buf (BulkWriteState *bulkstate)
void	smgr_bulk_write (BulkWriteState *bulkstate, BlockNumber blocknum, BulkWriteBuffer buf, bool page_std)
void	smgr_bulk_finish (BulkWriteState *bulkstate)

Typedef Documentation

BulkWriteBuffer

typedef PGIOAlignedBlock* BulkWriteBuffer

Definition at line 28 of file bulk_write.h.

BulkWriteState

typedef struct BulkWriteState BulkWriteState

Definition at line 1 of file bulk_write.h.

Function Documentation

smgr_bulk_finish()

void smgr_bulk_finish

(

BulkWriteState *

bulkstate

)

Definition at line 129 of file bulk_write.c.

{
    /* WAL-log and flush any remaining pages */
    smgr_bulk_flush(bulkstate);
 
    /*
     * When we wrote out the pages, we passed skipFsync=true to avoid the
     * overhead of registering all the writes with the checkpointer.  Register
     * the whole relation now.
     *
     * There is one hole in that idea: If a checkpoint occurred while we were
     * writing the pages, it already missed fsyncing the pages we had written
     * before the checkpoint started.  A crash later on would replay the WAL
     * starting from the checkpoint, therefore it wouldn't replay our earlier
     * WAL records.  So if a checkpoint started after the bulk write, fsync
     * the files now.
     */
    if (!SmgrIsTemp(bulkstate->smgr))
    {
        /*
         * Prevent a checkpoint from starting between the GetRedoRecPtr() and
         * smgrregistersync() calls.
         */
        Assert((MyProc->delayChkptFlags & DELAY_CHKPT_START) == 0);
        MyProc->delayChkptFlags |= DELAY_CHKPT_START;
 
        if (bulkstate->start_RedoRecPtr != GetRedoRecPtr())
        {
            /*
             * A checkpoint occurred and it didn't know about our writes, so
             * fsync() the relation ourselves.
             */
            MyProc->delayChkptFlags &= ~DELAY_CHKPT_START;
            smgrimmedsync(bulkstate->smgr, bulkstate->forknum);
            elog(DEBUG1, "flushed relation because a checkpoint occurred concurrently");
        }
        else
        {
            smgrregistersync(bulkstate->smgr, bulkstate->forknum);
            MyProc->delayChkptFlags &= ~DELAY_CHKPT_START;
        }
    }
}

References Assert, DEBUG1, DELAY_CHKPT_START, PGPROC::delayChkptFlags, elog, BulkWriteState::forknum, GetRedoRecPtr(), MyProc, BulkWriteState::smgr, smgr_bulk_flush(), smgrimmedsync(), SmgrIsTemp, smgrregistersync(), and BulkWriteState::start_RedoRecPtr.

Referenced by _bt_load(), btbuildempty(), end_heap_rewrite(), gist_indexsortbuild(), RelationCopyStorage(), and spgbuildempty().

smgr_bulk_get_buf()

BulkWriteBuffer smgr_bulk_get_buf

(

BulkWriteState *

bulkstate

)

Definition at line 295 of file bulk_write.c.

{
    return MemoryContextAllocAligned(bulkstate->memcxt, BLCKSZ, PG_IO_ALIGN_SIZE, 0);
}

References BulkWriteState::memcxt, MemoryContextAllocAligned(), and PG_IO_ALIGN_SIZE.

Referenced by _bt_blnewpage(), _bt_uppershutdown(), btbuildempty(), gist_indexsortbuild(), gist_indexsortbuild_levelstate_flush(), raw_heap_insert(), RelationCopyStorage(), and spgbuildempty().

smgr_bulk_start_rel()

BulkWriteState* smgr_bulk_start_rel	(	Relation	rel,
		ForkNumber	forknum
	)

Definition at line 86 of file bulk_write.c.

{
    return smgr_bulk_start_smgr(RelationGetSmgr(rel),
                                forknum,
                                RelationNeedsWAL(rel) || forknum == INIT_FORKNUM);
}

References INIT_FORKNUM, RelationGetSmgr(), RelationNeedsWAL, and smgr_bulk_start_smgr().

Referenced by _bt_load(), begin_heap_rewrite(), btbuildempty(), gist_indexsortbuild(), and spgbuildempty().

smgr_bulk_start_smgr()

BulkWriteState* smgr_bulk_start_smgr	(	struct SMgrRelationData *	smgr,
		ForkNumber	forknum,
		bool	use_wal
	)

smgr_bulk_write()

void smgr_bulk_write	(	BulkWriteState *	bulkstate,
		BlockNumber	blocknum,
		BulkWriteBuffer	buf,
		bool	page_std
	)

Definition at line 271 of file bulk_write.c.

{
    PendingWrite *w;
 
    w = &bulkstate->pending_writes[bulkstate->npending++];
    w->buf = buf;
    w->blkno = blocknum;
    w->page_std = page_std;
 
    if (bulkstate->npending == MAX_PENDING_WRITES)
        smgr_bulk_flush(bulkstate);
}

References PendingWrite::blkno, PendingWrite::buf, buf, MAX_PENDING_WRITES, BulkWriteState::npending, PendingWrite::page_std, BulkWriteState::pending_writes, and smgr_bulk_flush().

Referenced by _bt_blwritepage(), btbuildempty(), end_heap_rewrite(), gist_indexsortbuild(), gist_indexsortbuild_levelstate_flush(), raw_heap_insert(), RelationCopyStorage(), and spgbuildempty().