canal启动时候虚拟机内存不够

canal启动的时候报错我想问一下：

enJDK 64-Bit Server VM warning: ignoring option PermSize=96m; support was removed in 8.0

OpenJDK 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
OpenJDK 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.
OpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC threads appropriately using -XX:ParallelGCThreads=N
OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000700000000, 1073741824, 0) failed; error='Cannot allocate memory' (errno=12)

附注：我虚拟机只有2g内存，请教大神如何解决

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