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| author | Simon Riggs <simon@2ndQuadrant.com> | 2012-11-13 15:54:01 -0300 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2012-11-13 15:54:01 -0300 |
| commit | 68f7fe140bebc2b9bd2953934539cedb603fd01b (patch) | |
| tree | 9d48c05dbfc665e784ef88c3a5946b1cef0977b9 /src/backend/storage/ipc/procarray.c | |
| parent | 8f40ad1f4e75d3def4e86b665c8048a4c9676427 (diff) | |
| download | postgresql-68f7fe140bebc2b9bd2953934539cedb603fd01b.tar.gz postgresql-68f7fe140bebc2b9bd2953934539cedb603fd01b.zip | |
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 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) |