Last updated on NOVEMBER 28, 2016
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.5 and later
Information in this document applies to any platform.
Specific to Linux x86-64
ORA-27123: unable to attach to shared memory segment
Linux-x86_64 Error: 22: Invalid argument
Additional information: 1
Additional information: 425986
The "425986" number increases by 131072 with each attempt to start the database.
Database start with 204GB SGA but strace shows EINVAL when trying to allocate 205GB :
13285 shmat(131075, 0x2d80000000, 0) = -1 EINVAL (Invalid argument)
shmmax is set high (464GB in this case)
Increasing shmall has no effect
Server has 512Gb Memory avaliable.
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