WCS stops working about once a week

When we attempt to reach the WCS we receive this message occassionally,
Service Temporarily Unavailable
The server is temporarily unable to service your request due to maintenance  downtime or capacity problems. Please try again later.
Apache Server at 143.120.12.30 Port 443
The quick fix has been to reboot the server.  This is starting to happen at least once a week now, and seems to be getting worse.  No changes were made to the server.  This problem just started happening all of the sudden.  Help!
Health Monitor is running.
WCS is stopped.
Database server is running
Apache server is running
WCS Version 7.0.220.0

Kristen,
A known issue with WCS - 7.0.220.0 is because of a crash due to native memory which has been identified as the following bug
CSCtu49966 - WCS crashes due to native memory error in 7.0.220.0
The workaround for this issue is to enable Escape Analysis in the JVM.  How to do this is
outlined in the WCS 7.0.220.0 Release Notes at http://tools.cisco.com/squish/3202f . 
Essentially, Stop WCS, edit the startServer.bat/startServer.sh file (Windows/Linux)
appending "-XX:-DoEscapeAnalysis" (no quotes) to the set JAVA_OPTS line, then restart WCS.
Thanks,
Ram.

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