AnonHugePages: 57344 kB
HugePages_Total: 200
HugePages_Free: 200
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB

cat /proc/sys/vm/nr_hugepages
200

tail /etc/sysctl.conf

vm.nr_hugepages = 200 

之后sysctl -p 

pg配置文件

shared_buffers = 400MB 

huge_pages =on 

最后启动pg报错

2024-12-20 15:31:38.855 CST [4572] FATAL: could not map anonymous shared memory: Cannot allocate memory
2024-12-20 15:31:38.855 CST [4572] HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded available memory, swap space, or huge pages. To reduce the request size (currently 452878336 bytes), reduce PostgreSQL's shared memory usage, perhaps by reducing shared_buffers or max_connection

请问这个该如何修改？

$ free -g
total used free shared buff/cache available
Mem: 3 0 2 0 0 1
Swap: 11 0 11

CentOS Linux release 7.9    pg --12.6