mirrors/postgres
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Correct erroneous comment in GetOldestXmin()

Browse Source 
Craig Ringer
This commit is contained in:
Simon Riggs 2017-03-22 16:58:12 +00:00
parent af4b1a0869
commit c137c68ea6
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/backend/storage/ipc/procarray.c
View File

@ -1294,6 +1294,7 @@ TransactionIdIsActive(TransactionId xid)
* in the master but are still being replayed on the standby, thus possibly * in the master but are still being replayed on the standby, thus possibly
* making the GetOldestXmin reading go backwards. In this case there is a * making the GetOldestXmin reading go backwards. In this case there is a
* possibility that we lose data that the standby would like to have, but * possibility that we lose data that the standby would like to have, but
* unless the standby uses a replication slot to make its xmin persistent
* there is little we can do about that --- data is only protected if the * there is little we can do about that --- data is only protected if the
* walsender runs continuously while queries are executed on the standby. * walsender runs continuously while queries are executed on the standby.
* (The Hot Standby code deals with such cases by failing standby queries * (The Hot Standby code deals with such cases by failing standby queries