摘要：除直接调用System.gc外，触发Full GC执行的情况有如下四种。1. 旧生代空间不足旧生代空间只有在新生代对象转入及创建为大对象、大数组时才会出现不足的现象，当执行Full GC后空间仍然不足，则抛出如下错误：java.lang.OutOfMemoryError:Javaheapspace为... 阅读全文

摘要：java 打印gc日志set JAVA_OPTS=-XX:PermSize=64M -XX:MaxPermSize=128m -Xms512m -Xmx1024m -XX:+PrintGCDetails 在catalina.sh 中找到 JAVA_OPTS 在最后面添加 -XX:+PrintGCDe... 阅读全文

摘要：Eclipse崩溃，错误提示：MyEclipse has detected that less than 5% of the 64MB of PermGen (Non-heap memory) space remains. It is strongly recommendedthat you exit and restart MyEclipse with new virtual machine memoryparamters to increase this memory. Failure to do so can result indata loss. The recommended Ecl 阅读全文