diff options
| author | Simon Riggs <simon@2ndQuadrant.com> | 2012-11-13 15:56:28 -0300 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2012-11-13 15:56:28 -0300 |
| commit | f66e7ab6db30b7893493c4dfd5d642bef93b350f (patch) | |
| tree | 1f983796718805dd17b4c1b5dab327f9d487bf61 /src/backend/storage/ipc/procarray.c | |
| parent | 8805ff6580621d0daee350826de5211d6bb36ec3 (diff) | |
Clarify docs on hot standby lock release
Andres Freund and Simon Riggs
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 a3b0540aea7..371b1045a13 100644 --- a/src/backend/storage/ipc/procarray.c +++ b/src/backend/storage/ipc/procarray.c @@ -1565,6 +1565,11 @@ 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) |