This error usually means that openGauss's request for a shared memory segment exceeded your kernel's SHMMAX parameter. You can either reduce the request size or reconfigure the kernel with larger SHMMAX. To reduce the request size (currently 323545416 bytes), reduce openGauss's shared memory usage, perhaps by reducing shared_buffers.
If the request size is already small, it's possible that it is less than your kernel's SHMMIN parameter, in which case raising the request size or reconfiguring SHMMIN is called for.
The openGauss documentation contains more information about shared memory configuration.
2024-01-15 09:32:50.779 [unknown] [unknown] localhost 139965184570752 0[0:0#0] [BACKEND] BACKTRACELOG: tid[133]'s backtrace:
/usr/local/opengauss/bin/gaussdb(+0xe3a41e) [0x7f4c415b241e]
/usr/local/opengauss/bin/gaussdb(_Z9errfinishiz+0x441) [0x7f4c415aa651]
/usr/local/opengauss/bin/gaussdb(+0xbb6d9c) [0x7f4c4132ed9c]
/usr/local/opengauss/bin/gaussdb(_Z20PGSharedMemoryCreatembi+0x6a) [0x7f4c4132f16a]
/usr/local/opengauss/bin/gaussdb(_Z31CreateSharedMemoryAndSemaphoresbi+0x226) [0x7f4c42357486]
/usr/local/opengauss/bin/gaussdb(_Z8BaseInitv+0x4c) [0x7f4c415d1afc]
/usr/local/opengauss/bin/gaussdb(_Z20BootStrapProcessMainiPPc+0x50a) [0x7f4c416b21aa]
/usr/local/opengauss/bin/gaussdb(main+0x7c8) [0x7f4c410469c8]
/usr/lib64/libc.so.6(+0x2d210) [0x7f4c2f216210]

配置：
kernel.shmmni = 4096
kernel.sem = 250 6400000 1000 25600
fs.file-max = 6815744
fs.aio-max-nr = 1048576
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576
kernel.shmmax = 18446744073709551615
kernel.shmall = 1152921504606846720