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Rearrange vacuum-related bits in PGPROC as a bitmask, to better support

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having several of them.  Add two more flags: whether the process is
executing an ANALYZE, and whether a vacuum is for Xid wraparound (which
is obviously only set by autovacuum).

Sneakily move the worker's recently-acquired PostAuthDelay to a more useful
place.
This commit is contained in:
Alvaro Herrera
2007-10-24 20:55:36 +00:00
parent 3ef18797b8
commit 745c1b2c2a
7 changed files with 97 additions and 41 deletions
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23
src/backend/storage/ipc/procarray.c
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@ -23,7 +23,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/procarray.c,v 1.35 2007/09/23 18:50:38 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/ipc/procarray.c,v 1.36 2007/10/24 20:55:36 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@ -242,7 +242,8 @@ ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid)
proc->xid = InvalidTransactionId;
proc->lxid = InvalidLocalTransactionId;
proc->xmin = InvalidTransactionId;
proc->inVacuum = false; /* must be cleared with xid/xmin */
/* must be cleared with xid/xmin: */
proc->vacuumFlags &= ~PROC_VACUUM_STATE_MASK;
proc->inCommit = false; /* be sure this is cleared in abort */
/* Clear the subtransaction-XID cache too while holding the lock */
@ -267,7 +268,8 @@ ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid)
proc->lxid = InvalidLocalTransactionId;
proc->xmin = InvalidTransactionId;
proc->inVacuum = false; /* must be cleared with xid/xmin */
/* must be cleared with xid/xmin: */
proc->vacuumFlags &= ~PROC_VACUUM_STATE_MASK;
proc->inCommit = false; /* be sure this is cleared in abort */
Assert(proc->subxids.nxids == 0);
@ -296,8 +298,10 @@ ProcArrayClearTransaction(PGPROC *proc)
proc->xid = InvalidTransactionId;
proc->lxid = InvalidLocalTransactionId;
proc->xmin = InvalidTransactionId;
proc->inVacuum = false; /* redundant, but just in case */
proc->inCommit = false; /* ditto */
/* redundant, but just in case */
proc->vacuumFlags &= ~PROC_VACUUM_STATE_MASK;
proc->inCommit = false;
/* Clear the subtransaction-XID cache too */
proc->subxids.nxids = 0;
@ -546,7 +550,8 @@ TransactionIdIsActive(TransactionId xid)
* If allDbs is TRUE then all backends are considered; if allDbs is FALSE
* then only backends running in my own database are considered.
*
* If ignoreVacuum is TRUE then backends with inVacuum set are ignored.
* If ignoreVacuum is TRUE then backends with the PROC_IN_VACUUM flag set are
* ignored.
*
* This is used by VACUUM to decide which deleted tuples must be preserved
* in a table. allDbs = TRUE is needed for shared relations, but allDbs =
@ -586,7 +591,7 @@ GetOldestXmin(bool allDbs, bool ignoreVacuum)
{
volatile PGPROC *proc = arrayP->procs[index];
if (ignoreVacuum && proc->inVacuum)
if (ignoreVacuum && (proc->vacuumFlags & PROC_IN_VACUUM))
continue;
if (allDbs || proc->databaseId == MyDatabaseId)
@ -723,7 +728,7 @@ GetSnapshotData(Snapshot snapshot, bool serializable)
TransactionId xid;
/* Ignore procs running LAZY VACUUM */
if (proc->inVacuum)
if (proc->vacuumFlags & PROC_IN_VACUUM)
continue;
/* Update globalxmin to be the smallest valid xmin */
@ -1193,7 +1198,7 @@ CheckOtherDBBackends(Oid databaseId)
found = true;
if (proc->isAutovacuum)
if (proc->vacuumFlags & PROC_IS_AUTOVACUUM)
{
/* an autovacuum --- send it SIGTERM before sleeping */
int autopid = proc->pid;