How does data get into the ZEO storage then?
We have 10 ZEO clients that are for public consumption "READ ONLY". We have a separate ZEO client that is writing that is on a separate box. The website got slashdoted this morning and we had 4 zeo clients go out. Basically waiting for the zeo server for many minutes (basically hung and reporting 500s back to browsers). 4/10/07 - delta ah2 lock up - http://paste.plone.org/13919 4/10/07 - epsilon ah2 lock up - http://paste.plone.org/13920 4/10/07 - delta ah1 lock up - http://paste.plone.org/13936 4/10/07 - epsilon ah3 lock up - http://paste.plone.org/13935 Just FYI: Varnish didnt go over 3% CPU during the traffic surge; over 200 req/second. The ZEO Server was consistently at 2% CPU. Lots of traffic was getting through the cache and back to pound which was then load balancing to the ZEO clients. For Jim: We did not adjust the transaction timeout. Would that have helped in the case of READ's? The customer was posting content throughout the slashdot. The problem was that when the clients would update they would end up through 500s I am seeing something *very* strange in zeo.log: 2007-04-10T12:20:53 ERROR ZEO.zrpc.Connection(S) (172.16.235.120:49351) Erro r caught in asyncore Traceback (most recent call last): File "/usr/local/python-2.4.4/lib/python2.4/asyncore.py", line 69, in read obj.handle_read_event() File "/usr/local/python-2.4.4/lib/python2.4/asyncore.py", line 391, in han dle_read_event self.handle_read() File "/usr/local/zope/lib/python/ZEO/zrpc/smac.py", line 147, in handle_re ad d = self.recv(8192) File "/usr/local/python-2.4.4/lib/python2.4/asyncore.py", line 343, in rec v data = self.socket.recv(buffer_size) error: (113, 'No route to host') but several more of these: 2007-04-10T13:55:36 ERROR ZEO.zrpc.Connection(S) (172.16.235.119:44322) Erro r caught in asyncore Traceback (most recent call last): File "/usr/local/python-2.4.4/lib/python2.4/asyncore.py", line 69, in read obj.handle_read_event() File "/usr/local/python-2.4.4/lib/python2.4/asyncore.py", line 391, in han dle_read_event self.handle_read() File "/usr/local/zope/lib/python/ZEO/zrpc/smac.py", line 147, in handle_re ad d = self.recv(8192) File "/usr/local/python-2.4.4/lib/python2.4/asyncore.py", line 343, in rec v data = self.socket.recv(buffer_size) error: (110, 'Connection timed out') ------ _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev