cd /home/admin/workspace/my-blogs/batch-3/examples/flash-sale && ./run-29.sh
  /home/admin/workspace/my-blogs/batch-3/examples/common/pg.sh start b3-29 55429        (pg.sh 的 initdb 已带 -c dynamic_shared_memory_type=mmap)
  createdb via lab.common.Db.recreate(flash29)
  javac -d /tmp/b3-fix-29/flash-sale-29/classes -cp postgresql-42.7.7.jar  (examples/common/src + src/lab/flash/reserve + src/lab/flash/order)
  java -cp /tmp/b3-fix-29/flash-sale-29/classes:postgresql-42.7.7.jar lab.flash.order.Ch29Main > evidence/29/output.txt
  (C29-10/11/12/18/19 由 Ch29Main 启动子 JVM lab.flash.order.OrderWorker，并用 kill -9 <pid> 终止)
  /home/admin/workspace/my-blogs/batch-3/examples/common/pg.sh stop b3-29
