我得到了这个错误:
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at com.mysql.jdbc.MysqlIO.nextRowFast(MysqlIO.java:1585)
at com.mysql.jdbc.MysqlIO.nextRow(MysqlIO.java:1409)
at com.mysql.jdbc.MysqlIO.readSingleRowSet(MysqlIO.java:2886)
at com.mysql.jdbc.Mysql
我正在使用eclipse开发android应用程序,它一直运行得很好,但今天却出现了一些问题。
当我试图打开eclipse时,它会向我显示以下消息"Failed to create the java virtual machine. Error occurred during initialization of VM. Could not reserve enough space for object heap"
,这是我的eclipse.ini
-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813
我使用的是ubuntu20.04,我想要创建新的分区磁盘,正好有500 MB。但是,fdisk将其调整为512 can,是否有任何方法可以创建准确的500 it磁盘大小?
📷
ric@Eric:~/Downloads$ sudo fdisk /dev/sda
Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help)
我试图使用命令将旧数据库迁移到mysql集群(4个数据节点):
ALTER TABLE sample ENGINE=NDBCLUSTER
但我得到了以下错误:
The table '#sql-7ff3_3' is full
这张桌子上大约有3亿行。下面是我的配置文件:
/mysql-cluster/config.ini
[NDBD DEFAULT]
NoOfReplicas=2
DataDir=/data/mysql-cluster/ndb/
BackupDataDir=/data/mysql-cluster/backup/
DataMemory=10G
IndexMemory
我已经安装了JDK 8并试图运行Eclipse。我收到以下警告信息:
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512m;
support was removed in 8.0
忽略这个VM选项的原因是什么?