can i enlarge convertd_extract_max_bytes?

i get
2007-10-11 13:14:29,259 INFO [Convertd-1107] [] convert - Extracted text truncated at 10230134 bytes, as specified by convertd_extract_max_bytes
2007-10-11 13:14:30,493 INFO [Convertd-1107] [] ProtocolHandler - Exception occurred while handling connection
java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutp utStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStre am.java:136)
at java.io.DataOutputStream.write(DataOutputStream.ja va:90)
at java.io.DataOutputStream.writeUTF(DataOutputStream .java:384)
at java.io.DataOutputStream.writeUTF(DataOutputStream .java:306)
at com.zimbra.cs.convertd.TransformationHandler.doTex tExtraction(TransformationHandler.java:206)
at com.zimbra.cs.convertd.TransformationHandler.proce ssCommand(TransformationHandler.java:116)
at com.zimbra.cs.tcpserver.ProtocolHandler.processCon nection(ProtocolHandler.java:231)
at com.zimbra.cs.tcpserver.ProtocolHandler.run(Protoc olHandler.java:198)
at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Wo rker.run(Unknown Source)
at java.lang.Thread.run(Thread.java:595)