Insight slowdown and errors in log

In the past week or so, I have noticed a major slowdown of my Insight system (running 1.0.1 with a DB2 backend) in all operations - logging in, viewing report information, running reports, etc - despite no changes in system configuration.

When I check the SystemOut.log, I see multiple occurrences of this "Post body contains less bytes than specified" error. This snippet was generated this morning by merely logging in to the system (using LDAP authentication). This appears to be some sort of WAS error, but any assistance on how to update my configuration to speed things up and avoid these errors would be appreciated. Thanks!

00000023 srt E com.ibm.ws.webcontainer.srt.SRTServletRequest parseParameters SRVE0133E: An error occurred while parsing parameters. {0}
java.io.IOException: SRVE0216E: post body contains less bytes than specified by content-length
at com.ibm.ws.webcontainer.servlet.RequestUtils.parsePostData(RequestUtils.java:306)
at com.ibm.ws.webcontainer.srt.SRTServletRequest.parseParameters(SRTServletRequest.java:1865)
at com.ibm.ws.webcontainer.srt.SRTServletRequest.getParameter(SRTServletRequest.java:1505)
at com.ibm.rational.reporting.servlet.DispatchServlet.handleRequest(DispatchServlet.java:165)
at com.ibm.rational.reporting.servlet.DispatchServlet.doPost(DispatchServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)