Hello All, Have a strange issue that I can not solve. I have a new server that has 1TB ram (not a typo). I have been fighting with this evening to start up with a shared_buffer setting over 2GB. When the memory allocation breaks 2GB, the database won’t start. I’ve dropped it down to 500M to get the database online. We’ve tried both SysV memory and mmap memory. Any ideas on what is going on and how to resolve? I’m sure I’m missing something obvious, but it is totally eluding me. OS: Ubuntu 18.04 Memory: 1007GB CPU: Intel(R) Xeon(R) CPU X7550 @ 2.00GHz (64 cores total) Kernel Memory: kernel.shmmax = 274877906944 kernel.shmall = 17179869184 Postgres Config: name | setting autovacuum_max_workers | 3 autovacuum_work_mem | -1 effective_cache_size | 98992128 fsync | on full_page_writes | on maintenance_work_mem | 2097152 shared_buffers | 64000 shared_memory_type | sysv temp_buffers | 4096 wal_buffers | 2048 work_mem | 119990 If you need additional parameters, please ask SysV Error: Feb 25 01:55:16 appdb-server01.production.aweberint.com postgres[34680]: FATAL: could not create shared memory segment: Cannot allocate memory DETAIL: Failed system call was shmget(key=2359323, size=2063564800, 03600). HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded your kernel's SHMALL parameter. You might need to reconfigure the kernel with larger SHMALL. FATAL: could not map anonymous shared memory: Cannot allocate memory 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 1635737600 bytes), reduce PostgreSQL's shared memory usage, perhaps by reducing shared_buffers or max_connections. Thanks, Chris Hoover Senior DBA AWeber.com Cell: (803) 528-2269 Email: chrish@xxxxxxxxxx |
