Running Kanaka 2.7.1 on OES 11 on a VM (ESXi host) 4 CPUs 6 GB of RAM. Just to note the issues I am having now also occurred in our previous install on OES 2 SP 3 with version 2.6. Daily the server will stop responding. No rhyme or reason, the only way to get it to recover is reboot. Here is what I see in the engine logs.

After expandline, result 0: MAP R N:=.JCKFP01N_TECHLAB.SRV.JCK.MS.GISD:
01 2012-08-29 10:48:51 -18000 7 0008 6837 7fdd58de6700 ParseLine called, line: MAP R N:=.JCKFP01N_TECHLAB.SRV.JCK.MS.GISD:
01 2012-08-29 10:48:51 -18000 8 0008 6837 7fdd58de6700 LSP: Skipping command MAP R N:=.JCKFP01N_TECHLAB.SRV.JCK.MS.GISD: due to false condition.
01 2012-08-29 10:48:51 -18000 7 0008 6837 7fdd58de6700 LSP: Evaluating line
01 2012-08-29 10:48:51 -18000 7 0008 6837 7fdd58de6700 LSP: Evaluating line END
01 2012-08-29 10:48:51 -18000 7 0008 6837 7fdd58de6700 LSP: After compressline: END
01 2012-08-29 10:48:51 -18000 7 0008 6837 7fdd58de6700 LSP: After expandline, result 0: END
01 2012-08-29 10:48:51 -18000 7 0008 6837 7fdd58de6700 ParseLine called, line: END
01 2012-08-29 10:48:51 -18000 8 0008 6837 7fdd58de6700 LSP: END encountered, current if level: 1.
01 2012-08-29 10:48:56 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:01 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:06 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:11 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:16 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:21 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:26 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:31 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:36 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:41 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:46 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:51 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:49:56 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:01 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:06 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:11 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:16 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:21 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:26 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:31 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:36 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:41 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:46 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:51 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:50:56 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:51:01 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:51:06 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:51:11 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:51:16 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:51:21 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:51:26 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...
01 2012-08-29 10:51:31 -18000 8 0001 6837 7fdd87bd6700 WD: Engine is running...

Engine is running logs continue until reboot. During this time No web access, no logins, nothing to the server.