/*
* Initialize CommitTs at system startup (postmaster start or standalone
* backend)
*/
void
CommitTsShmemInit(void)
{
bool found;
CommitTsCtl->PagePrecedes = CommitTsPagePrecedes;
SimpleLruInit(CommitTsCtl, "commit_timestamp", CommitTsShmemBuffers(), 0,
CommitTsControlLock, "pg_commit_ts",
LWTRANCHE_COMMITTS_BUFFERS);
commitTsShared = ShmemInitStruct("CommitTs shared",
sizeof(CommitTimestampShared),
&found);
if (!IsUnderPostmaster)
{
Assert(!found);
commitTsShared->xidLastCommit = InvalidTransactionId;
TIMESTAMP_NOBEGIN(commitTsShared->dataLastCommit.time);
commitTsShared->dataLastCommit.nodeid = InvalidRepOriginId;
commitTsShared->commitTsActive = false;
}
else
Assert(found);
}
void
DistributedLog_ShmemInit(void)
{
bool found;
/* Set up SLRU for the distributed log. */
DistributedLogCtl->PagePrecedes = DistributedLog_PagePrecedes;
SimpleLruInit(DistributedLogCtl, "DistributedLogCtl", NUM_DISTRIBUTEDLOG_BUFFERS,
DistributedLogControlLock, DISTRIBUTEDLOG_DIR);
/* Create or attach to the shared structure */
DistributedLogShared =
(DistributedLogShmem *) ShmemInitStruct(
"DistributedLogShmem",
DistributedLog_SharedShmemSize(),
&found);
if (!DistributedLogShared)
elog(FATAL, "could not initialize Distributed Log shared memory");
if (!found)
{
DistributedLogShared->oldestXid = InvalidTransactionId;
DistributedLogShared->knowHighestUnusedPage = false;
DistributedLogShared->highestUnusedPage = -1;
}
}
void
DistributedXidMapShmemInit_SLru(void)
{
DistributedXidMapCtl->PagePrecedes = DistributedXidMapPagePrecedes;
SimpleLruInit(DistributedXidMapCtl, "DistributedXidMap Ctl", NUM_DISTRIBUTEDXIDMAP_BUFFERS,
DistributedXidMapControlLock, DISTRIBUTEDXIDMAP_DIR);
/* Override default assumption that writes should be fsync'd */
DistributedXidMapCtl->do_fsync = false;
}
void
SUBTRANSShmemInit(void)
{
SubTransCtl->PagePrecedes = SubTransPagePrecedes;
SimpleLruInit(SubTransCtl, "SUBTRANS Ctl", NUM_SUBTRANS_BUFFERS, 0,
SubtransControlLock, "pg_subtrans");
/* Override default assumption that writes should be fsync'd */
SubTransCtl->do_fsync = false;
}
