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Diffstat (limited to 'src/backend/storage/ipc/procarray.c')
| -rw-r--r-- | src/backend/storage/ipc/procarray.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/backend/storage/ipc/procarray.c b/src/backend/storage/ipc/procarray.c index d38164caa73..8c0d7b0ea95 100644 --- a/src/backend/storage/ipc/procarray.c +++ b/src/backend/storage/ipc/procarray.c @@ -1564,6 +1564,11 @@ ProcArrayInstallImportedXmin(TransactionId xmin, TransactionId sourcexid) * We don't worry about updating other counters, we want to keep this as * simple as possible and leave GetSnapshotData() as the primary code for * that bookkeeping. + * + * Note that if any transaction has overflowed its cached subtransactions + * then there is no real need include any subtransactions. That isn't a + * common enough case to worry about optimising the size of the WAL record, + * and we may wish to see that data for diagnostic purposes anyway. */ RunningTransactions GetRunningTransactionData(void) |