Index: src/z3c/saconfig/zcml.py
===================================================================
--- src/z3c/saconfig/zcml.py	(revision 101264)
+++ src/z3c/saconfig/zcml.py	(working copy)
@@ -27,13 +27,28 @@
         required=False,
         default=False)
 
+    pool_size = zope.schema.Int(
+        title=u"Pool size",
+        description=u"Number of connections to keep open inside the connection pool.",
+        required=False)
+        
+    pool_recycle = zope.schema.Int(
+        title=u"Pool recycle",
+        description=u"Recycle connections after the given number of seconds have passed.",
+        required=False)
+
+    pool_timeout = zope.schema.Int(
+        title=u"Pool timeout",
+        description=u"Number of seconds to wait before giving up on getting a connection from the pool.",
+        required=False)
+
     setup = zope.schema.BytesLine(
         title=u'After engine creation hook',
         description=u'Callback for creating mappers etc. One argument is passed, the engine',
         required=False,
         default=None)
+    
 
-
 class ISessionDirective(zope.interface.Interface):
     """Registers a database scoped session"""
 
@@ -62,16 +77,27 @@
         default="z3c.saconfig.utility.GloballyScopedSession")
 
 
-def engine(_context, url, name=u"", echo=False, setup=None, twophase=False):
-    factory = utility.EngineFactory(url, echo=echo)
-    
+def engine(_context, url, name=u"", echo=False, setup=None, twophase=False,
+           pool_size=None, pool_recycle=None, pool_timeout=None):
+    # to avoid overriding defaults, we only provide pool configuration
+    # parameters if set
+    kwargs = {}
+    if pool_size is not None:
+        kwargs['pool_size'] = pool_size
+    if pool_recycle is not None:
+        kwargs['pool_recycle'] = pool_recycle
+    if pool_timeout is not None:
+        kwargs['pool_timeout'] = pool_timeout
+
+    factory = utility.EngineFactory(url, echo=echo, **kwargs)
+
     zope.component.zcml.utility(
         _context,
         provides=interfaces.IEngineFactory,
         component=factory,
         permission=zope.component.zcml.PublicPermission,
         name=name)
-    
+
     if setup:
         if _context.package is None:
             callback = resolve(setup)
