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Diffstat (limited to 'src/backend/access/transam/README.parallel')
| -rw-r--r-- | src/backend/access/transam/README.parallel | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/backend/access/transam/README.parallel b/src/backend/access/transam/README.parallel index f09a5806345..85e5840feba 100644 --- a/src/backend/access/transam/README.parallel +++ b/src/backend/access/transam/README.parallel @@ -125,6 +125,10 @@ worker. This includes: - State related to pending REINDEX operations, which prevents access to an index that is currently being rebuilt. + - Active relmapper.c mapping state. This is needed to allow consistent + answers when fetching the current relfilenode for relation oids of + mapped relations. + To prevent unprincipled deadlocks when running in parallel mode, this code also arranges for the leader and all workers to participate in group locking. See src/backend/storage/lmgr/README for more details. |