shmmax error for start postgresql

During start postgresql appear error  
Apr 07 12:38:55 localhost.localdomain pg_ctl[9810]: FATAL: could not create shared memory segment: Invalid argument 
Apr 07 12:38:55 localhost.localdomain pg_ctl[9810]: DETAIL: Failed system call was shmget(key=5432001, size=41279488, 03600). 
Apr 07 12:38:55 localhost.localdomain pg_ctl[9810]: HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded your ker...nections. 
Apr 07 12:38:55 localhost.localdomain pg_ctl[9810]: If the request size is already small, it's possible that it is less than your kernel's SHMMIN parameter...lled for. 
Apr 07 12:38:55 localhost.localdomain pg_ctl[9810]: The PostgreSQL documentation contains more information about shared memory configuration. 
Apr 07 12:39:00 localhost.localdomain pg_ctl[9810]: pg_ctl: could not start server Apr 07 12:39:00 localhost.localdomain pg_ctl[9810]: Examine the log output.

fix in chef recipes

shmmax='kernel.shmmax=335544320' 
execute "set shmax" do
 command "sysctl -w #{shmmax}" 
end 

file "/etc/sysctl.d/shmmax.conf" do
 content shmmax 
end