Startup Fails with ORA-27125 And Alert Log Shows "Error: ENOSPC while creating shared memory segment of size xxxxx bytes"
(Doc ID 2325742.1)
Last updated on MARCH 08, 2021
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
Undersized SHMMAX resulting to host trying to exceed SHMALL when adding a new instance as indicated below.
Reset SHMMAX and SHMALL to lower values and try to connect to the database.
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