1 files changed, 19 insertions, 0 deletions

diff --git a/Mailman/Defaults.py.in b/Mailman/Defaults.py.in
index 5a9114cfb..cfb60802e 100644
--- a/Mailman/Defaults.py.in
+++ b/Mailman/Defaults.py.in
@@ -1065,6 +1065,25 @@ LIST_LOCK_LIFETIME = hours(5)
 # the message will be re-queued for later delivery.
 LIST_LOCK_TIMEOUT = seconds(10)
 
+# Set this to true to turn on lock debugging messages for the pending
+# requests database, which will be written to logs/locks.  If you think
+# you're having lock problems, or just want to tune the locks for your
+# system, turn on lock debugging.
+PENDINGDB_LOCK_DEBUGGING = 0
+
+# This variable specifies how long an attempt will be made to acquire a
+# pendingdb lock by the incoming qrunner process.  If the lock acquisition
+# times out, the message will be re-queued for later delivery.
+PENDINGDB_LOCK_TIMEOUT = seconds(30)
+
+# The pendingdb is shared among all lists, and handles all list
+# (un)subscriptions, admin approvals and otherwise held messages, so it is
+# potentially locked a lot more often than single lists. Mailman deals with
+# this by re-trying any attempts to alter the pendingdb that failed because
+# of locking errors. This variable indicates howmany attempt should be made
+# before abandoning all hope.
+PENDINGDB_LOCK_ATTEMPTS = 10
+
 
 
 #####