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Exit from base backups when shutdown is requested

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When the exit waits until the whole backup completes, it may take
a very long time.

In passing, add back an error check in the main loop so we detect
clients that disconnect much earlier if the backup is large.
This commit is contained in:
Magnus Hagander
2011-01-14 12:36:45 +01:00
parent 52948169bc
commit 688423d004
3 changed files with 23 additions and 9 deletions
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16
src/backend/replication/walsender.c
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@@ -88,8 +88,8 @@ static XLogRecPtr sentPtr = {0, 0};
/* Flags set by signal handlers for later service in main loop */
static volatile sig_atomic_t got_SIGHUP = false;
static volatile sig_atomic_t shutdown_requested = false;
static volatile sig_atomic_t ready_to_stop = false;
volatile sig_atomic_t walsender_shutdown_requested = false;
volatile sig_atomic_t walsender_ready_to_stop = false;
/* Signal handlers */
static void WalSndSigHupHandler(SIGNAL_ARGS);
@@ -426,16 +426,16 @@ WalSndLoop(void)
* When SIGUSR2 arrives, we send all outstanding logs up to the
* shutdown checkpoint record (i.e., the latest record) and exit.
*/
if (ready_to_stop)
if (walsender_ready_to_stop)
{
if (!XLogSend(output_message, &caughtup))
break;
if (caughtup)
shutdown_requested = true;
walsender_shutdown_requested = true;
}
/* Normal exit from the walsender is here */
if (shutdown_requested)
if (walsender_shutdown_requested)
{
/* Inform the standby that XLOG streaming was done */
pq_puttextmessage('C', "COPY 0");
@@ -461,7 +461,7 @@ WalSndLoop(void)
if (!XLogSend(output_message, &caughtup))
break;
if (caughtup && !got_SIGHUP && !ready_to_stop && !shutdown_requested)
if (caughtup && !got_SIGHUP && !walsender_ready_to_stop && !walsender_shutdown_requested)
{
/*
* XXX: We don't really need the periodic wakeups anymore,
@@ -841,7 +841,7 @@ WalSndSigHupHandler(SIGNAL_ARGS)
static void
WalSndShutdownHandler(SIGNAL_ARGS)
{
shutdown_requested = true;
walsender_shutdown_requested = true;
if (MyWalSnd)
SetLatch(&MyWalSnd->latch);
}
@@ -889,7 +889,7 @@ WalSndXLogSendHandler(SIGNAL_ARGS)
static void
WalSndLastCycleHandler(SIGNAL_ARGS)
{
ready_to_stop = true;
walsender_ready_to_stop = true;
if (MyWalSnd)
SetLatch(&MyWalSnd->latch);
}