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Commit6e546c2

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Arrange to call localtime() during postmaster startup. On most Unixen,
the first call of localtime() in a process will read /usr/lib/tztab orlocal equivalent. Better to do this once in the postmaster and inheritthe data by fork() than to have to do it during every backend start.
1 parent9103372 commit6e546c2

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1 file changed

+19
-5
lines changed

1 file changed

+19
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‎src/backend/postmaster/postmaster.c‎

Lines changed: 19 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -37,7 +37,7 @@
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*
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*
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* IDENTIFICATION
40-
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.264 2002/01/10 01:11:45 tgl Exp $
40+
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.265 2002/02/19 19:53:35 tgl Exp $
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*
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* NOTES
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*
@@ -723,6 +723,10 @@ PostmasterMain(int argc, char *argv[])
723723

724724
/*
725725
* Set up signal handlers for the postmaster process.
726+
*
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* CAUTION: when changing this list, check for side-effects on the
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* signal handling setup of child processes. See tcop/postgres.c,
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* bootstrap/bootstrap.c, and postmaster/pgstat.c.
726730
*/
727731
pqinitmask();
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PG_SETMASK(&BlockSig);
@@ -749,6 +753,18 @@ PostmasterMain(int argc, char *argv[])
749753
*/
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whereToSendOutput=None;
751755

756+
/*
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* On many platforms, the first call of localtime() incurs significant
758+
* overhead to load timezone info from the system configuration files.
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* By doing it once in the postmaster, we avoid having to do it in every
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* started child process. The savings are not huge, but they add up...
761+
*/
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{
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time_tnow=time(NULL);
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(void)localtime(&now);
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}
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752768
/*
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* Initialize and startup the statistics collector process
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*/
@@ -1793,15 +1809,14 @@ SignalChildren(int signal)
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Dlelem*curr,
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*next;
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Backend*bp;
1796-
intmypid=getpid();
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curr=DLGetHead(BackendList);
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while (curr)
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{
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next=DLGetSucc(curr);
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bp= (Backend*)DLE_VAL(curr);
18031818

1804-
if (bp->pid!=mypid)
1819+
if (bp->pid!=MyProcPid)
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{
18061821
if (DebugLvl >=1)
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elog(DEBUG,"SignalChildren: sending signal %d to process %d",
@@ -2412,13 +2427,12 @@ CountChildren(void)
24122427
{
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Dlelem*curr;
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Backend*bp;
2415-
intmypid=getpid();
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intcnt=0;
24172431

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for (curr=DLGetHead(BackendList);curr;curr=DLGetSucc(curr))
24192433
{
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bp= (Backend*)DLE_VAL(curr);
2421-
if (bp->pid!=mypid)
2435+
if (bp->pid!=MyProcPid)
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cnt++;
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}
24242438
if (CheckPointPID!=0)

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