Fossil

  Lease x;
  sqlite3_uint64 tmNow;

  if( backofficeDb ) return;
  if( g.zRepositoryName==0 ) return;
  if( g.db==0 ) return;
  if( !db_table_exists("repository","config") ) return;
  if( db_get_boolean("backoffice-disable",0) ) return;
  tmNow = time(0);
  backofficeReadLease(&x);
  if( x.tmNext>=tmNow && backofficeProcessExists(x.idNext) ){
    /* Another backoffice process is already queued up to run.  This
    ** process does not need to do any backoffice work. */
    return;
  }else{

*/
/*
** SETTING: backoffice-nodelay boolean default=off
** If backoffice-nodelay is true, then the backoffice processing
** will never invoke sleep().  If it has nothing useful to do,
** it simply exits.
*/
/*
** SETTING: backoffice-disable boolean default=off
** If backoffice-disable is true, then the automatic backoffice
** processing is disabled.  Automatic backoffice processing is the
** backoffice work that normally runs after each web page is
** rendered.  Backoffice processing that is triggered by the
** "fossil backoffice" command is unaffected by this setting.
**
** Backoffice processing does things such as delivering
** email notifications.  So if this setting is true, and if
** there is no cron job periodically running "fossil backoffice",
** email notifications and other work normally done by the
** backoffice will not occur.
*/
/*
** SETTING: backoffice-logfile width=40
** If backoffice-logfile is not an empty string and is a valid
** filename, then a one-line message is appended to that file
** every time the backoffice runs.  This can be used for debugging,
** to ensure that backoffice is running appropriately.
*/

for a repository:

>  fossil test-backoffice-lease -R _REPOSITORY_

Running that command every few seconds should show what is going on with
backoffice processing in a particular repository.

There are also settings that control backoffice behavior.  The
"backoffice-nodelay" setting prevents the "next" process from taking a
lease and sleeping.  If "backoffice-nodelay" is set, that causes all
backoffice processes to exit either immediately or after doing whatever
backoffice works needs to be done.  If something is going wrong and
backoffice leases are causing delays in webpage processing, then setting
"backoffice-nodelay" to true can work around the problem until the bug
can be fixed.  The "backoffice-logfile" setting is the name of a log
file onto which is appended a short message everything a backoffice
process actually starts to do the backoffice work.  This log file can
be used to verify that backoffice really is running, if there is any
doubt.  The "backoffice-disable" setting prevents automatic backoffice
processing, if true.  Use this to completely disable backoffice processing
that occurs automatically after each HTTP request.  The "backoffice-disable"
setting does not affect the operation of the manual 
"fossil backoffice" command.
Most installations should leave "backoffice-nodelay" and "backoffice-disable"
set to their default values of off and
leave "backoffice-logfile" unset or set to an empty string.