我正在使用具有512兆内存ram的DigiOcean实例，使用kafka出现以下错误。我不是Java熟练的开发人员。如何调整卡夫卡以利用少量的ram。这是一个开发服务器。我不想为一台更大的机器每小时多付钱。

#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (malloc) failed to allocate 986513408 bytes for committing reserved memory.
# An error report file with more information is saved as:
# //hs_err_pid6500.log
OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000bad30000, 986513408, 0) failed; error='Cannot allocate memory' (errno=12)