ORA-00845:MEMORY_TARGET not supported on this system


After Oracle 18c Automatic Storage management software is completed, i tried to start ASM instance but i got ORA-00845:MEMORY_TARGET not supported on this system error.


[oracle@MehmetSalih ~]$ sqlplus / as sysasm

SQL*Plus: Release - Production on Tue Feb 19 12:59:47 2019

Copyright (c) 1982, 2018, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup
ORA-00845: MEMORY_TARGET not supported on this system



To solve this error you need to mount tmpfs like below.


[root@MehmetSalih oradata]# mount -t tmpfs shmfs -o size=4096m /dev/shm
[root@MehmetSalih oradata]#

[oracle@MehmetSalih ~]$ df -h /dev/shm
Filesystem            Size  Used Avail Use% Mounted on
tmpfs                 3.9G  119M  3.9G  1% /dev/shm



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About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

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