diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/replication/walsender.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c index 1028919aecb..216baeda5cd 100644 --- a/src/backend/replication/walsender.c +++ b/src/backend/replication/walsender.c @@ -91,10 +91,14 @@ #include "utils/guc.h" #include "utils/memutils.h" #include "utils/pg_lsn.h" +#include "utils/pgstat_internal.h" #include "utils/ps_status.h" #include "utils/timeout.h" #include "utils/timestamp.h" +/* Minimum interval used by walsender for stats flushes, in ms */ +#define WALSENDER_STATS_FLUSH_INTERVAL 1000 + /* * Maximum data payload in a WAL data message. Must be >= XLOG_BLCKSZ. * @@ -1797,6 +1801,7 @@ WalSndWaitForWal(XLogRecPtr loc) int wakeEvents; uint32 wait_event = 0; static XLogRecPtr RecentFlushPtr = InvalidXLogRecPtr; + TimestampTz last_flush = 0; /* * Fast path to avoid acquiring the spinlock in case we already know we @@ -1817,6 +1822,7 @@ WalSndWaitForWal(XLogRecPtr loc) { bool wait_for_standby_at_stop = false; long sleeptime; + TimestampTz now; /* Clear any already-pending wakeups */ ResetLatch(MyLatch); @@ -1927,7 +1933,8 @@ WalSndWaitForWal(XLogRecPtr loc) * new WAL to be generated. (But if we have nothing to send, we don't * want to wake on socket-writable.) */ - sleeptime = WalSndComputeSleeptime(GetCurrentTimestamp()); + now = GetCurrentTimestamp(); + sleeptime = WalSndComputeSleeptime(now); wakeEvents = WL_SOCKET_READABLE; @@ -1936,6 +1943,15 @@ WalSndWaitForWal(XLogRecPtr loc) Assert(wait_event != 0); + /* Report IO statistics, if needed */ + if (TimestampDifferenceExceeds(last_flush, now, + WALSENDER_STATS_FLUSH_INTERVAL)) + { + pgstat_flush_io(false); + (void) pgstat_flush_backend(false, PGSTAT_BACKEND_FLUSH_IO); + last_flush = now; + } + WalSndWait(wakeEvents, sleeptime, wait_event); } @@ -2742,6 +2758,8 @@ WalSndCheckTimeOut(void) static void WalSndLoop(WalSndSendDataCallback send_data) { + TimestampTz last_flush = 0; + /* * Initialize the last reply timestamp. That enables timeout processing * from hereon. @@ -2836,6 +2854,9 @@ WalSndLoop(WalSndSendDataCallback send_data) * WalSndWaitForWal() handle any other blocking; idle receivers need * its additional actions. For physical replication, also block if * caught up; its send_data does not block. + * + * The IO statistics are reported in WalSndWaitForWal() for the + * logical WAL senders. */ if ((WalSndCaughtUp && send_data != XLogSendLogical && !streamingDoneSending) || @@ -2843,6 +2864,7 @@ WalSndLoop(WalSndSendDataCallback send_data) { long sleeptime; int wakeEvents; + TimestampTz now; if (!streamingDoneReceiving) wakeEvents = WL_SOCKET_READABLE; @@ -2853,11 +2875,21 @@ WalSndLoop(WalSndSendDataCallback send_data) * Use fresh timestamp, not last_processing, to reduce the chance * of reaching wal_sender_timeout before sending a keepalive. */ - sleeptime = WalSndComputeSleeptime(GetCurrentTimestamp()); + now = GetCurrentTimestamp(); + sleeptime = WalSndComputeSleeptime(now); if (pq_is_send_pending()) wakeEvents |= WL_SOCKET_WRITEABLE; + /* Report IO statistics, if needed */ + if (TimestampDifferenceExceeds(last_flush, now, + WALSENDER_STATS_FLUSH_INTERVAL)) + { + pgstat_flush_io(false); + (void) pgstat_flush_backend(false, PGSTAT_BACKEND_FLUSH_IO); + last_flush = now; + } + /* Sleep until something happens or we time out */ WalSndWait(wakeEvents, sleeptime, WAIT_EVENT_WAL_SENDER_MAIN); } |