#Make sure that `initmemory` is not only allocated, but committed to the process, before starting the database. This reduces memory fragmentation, increasing the effectiveness of transparent huge pages. It also reduces the possibility of seeing performance drop due to heap-growing GC events, where a decrease in available page cache leads to an increase in mean IO response time. Try reducing the heap memory, if this flag degrades performance. 确保在启动数据库之前,“initmemory”不仅被分配,而且被提交到进程。这减少了内存碎片,增加了透明大页面的有效性。它还减少了由于堆增长的GC事件而导致性能下降的可能性,其中可用页面缓存的减少导致平均IO响应时间的增加。如果此标志降低性能,请减少堆内存。