Error with PostgreSQL with use of FractalSnowflake

[jaclark5]

Describe the bug
After repeated use of FractalSnowflake, I get the error 2025-03-12 16:45:53.533 EDT [83553] HINT: This error does *not* mean that you have run out of disk space. It occurs either if all available shared memory IDs have been taken, in which case you need to raise the SHMMNI parameter in your kernel, or because the system's overall limit for shared memory has been reached. The PostgreSQL documentation contains more information about shared memory configuration. child process exited with exit code 1 initdb: removing data directory "/var/folders/dr/9nnhm1493kv7_s9r_wj_l_jm0000gn/T/tmp7rzc719o/db"

To Reproduce
Run the following an absurd number of times.

from qcfractal.snowflake import FractalSnowflake
snowflake = FractalSnowflake()
client = snowflake.client()

Expected behavior
There would not be an error

Additional context
Using an M3 MacBook Pro

[jaclark5]

The only reliable solution is to kill all postgres processes in my Activity Monitor and then restart my computer.

@bennybp suggests that it could be because when restarting a kernel in a Jupyter notebook, it does a hard stop instead of soft to clean up the attached processes.