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f1169ab501
Doing so doesn't seem to be within the purpose of the per user connection limits, and has particularly unfortunate effects in conjunction with parallel queries. Backpatch to 9.6 where parallel queries were introduced. David Rowley, reviewed by Robert Haas and Albe Laurenz.
93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* procarray.h
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* POSTGRES process array definitions.
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*
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*
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* Portions Copyright (c) 1996-2017, 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/storage/procarray.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PROCARRAY_H
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#define PROCARRAY_H
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#include "storage/lock.h"
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#include "storage/standby.h"
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#include "utils/relcache.h"
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#include "utils/snapshot.h"
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extern Size ProcArrayShmemSize(void);
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extern void CreateSharedProcArray(void);
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extern void ProcArrayAdd(PGPROC *proc);
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extern void ProcArrayRemove(PGPROC *proc, TransactionId latestXid);
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extern void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid);
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extern void ProcArrayClearTransaction(PGPROC *proc);
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extern void ProcArrayInitRecovery(TransactionId initializedUptoXID);
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extern void ProcArrayApplyRecoveryInfo(RunningTransactions running);
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extern void ProcArrayApplyXidAssignment(TransactionId topxid,
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int nsubxids, TransactionId *subxids);
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extern void RecordKnownAssignedTransactionIds(TransactionId xid);
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extern void ExpireTreeKnownAssignedTransactionIds(TransactionId xid,
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int nsubxids, TransactionId *subxids,
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TransactionId max_xid);
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extern void ExpireAllKnownAssignedTransactionIds(void);
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extern void ExpireOldKnownAssignedTransactionIds(TransactionId xid);
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extern int GetMaxSnapshotXidCount(void);
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extern int GetMaxSnapshotSubxidCount(void);
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extern Snapshot GetSnapshotData(Snapshot snapshot);
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extern bool ProcArrayInstallImportedXmin(TransactionId xmin,
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TransactionId sourcexid);
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extern bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc);
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extern RunningTransactions GetRunningTransactionData(void);
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extern bool TransactionIdIsInProgress(TransactionId xid);
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extern bool TransactionIdIsActive(TransactionId xid);
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extern TransactionId GetOldestXmin(Relation rel, bool ignoreVacuum);
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extern TransactionId GetOldestActiveTransactionId(void);
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extern TransactionId GetOldestSafeDecodingTransactionId(void);
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extern VirtualTransactionId *GetVirtualXIDsDelayingChkpt(int *nvxids);
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extern bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids, int nvxids);
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extern PGPROC *BackendPidGetProc(int pid);
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extern PGPROC *BackendPidGetProcWithLock(int pid);
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extern int BackendXidGetPid(TransactionId xid);
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extern bool IsBackendPid(int pid);
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extern VirtualTransactionId *GetCurrentVirtualXIDs(TransactionId limitXmin,
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bool excludeXmin0, bool allDbs, int excludeVacuum,
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int *nvxids);
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extern VirtualTransactionId *GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid);
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extern pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode);
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extern bool MinimumActiveBackends(int min);
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extern int CountDBBackends(Oid databaseid);
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extern int CountDBConnections(Oid databaseid);
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extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
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extern int CountUserBackends(Oid roleid);
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extern bool CountOtherDBBackends(Oid databaseId,
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int *nbackends, int *nprepared);
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extern void XidCacheRemoveRunningXids(TransactionId xid,
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int nxids, const TransactionId *xids,
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TransactionId latestXid);
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extern void ProcArraySetReplicationSlotXmin(TransactionId xmin,
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TransactionId catalog_xmin, bool already_locked);
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extern void ProcArrayGetReplicationSlotXmin(TransactionId *xmin,
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TransactionId *catalog_xmin);
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#endif /* PROCARRAY_H */
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