Ora-27102 Out Of Memory Linux Error 12 Cannot Allocate Memory
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Ora-27137: Unable To Allocate Large Pages To Create A Shared Memory Segment
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this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before http://www.dbforums.com/showthread.php?1672675-ORA-27102-out-of-memory-on-Linux-unable-to-startup-instance you can post: click the register link above to proceed. To start http://www.asktherealtom.ch/?tag=ora-27102-out-of-memory viewing messages, select the forum that you want to visit from the selection below. Results 1 to 4 of 4 Thread: ORA-27102: out of memory on Linux, unable to startup instance Tweet Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search Display Linear out of Mode Switch to Hybrid Mode Switch to Threaded Mode 12-13-11,04:31 #1 anas343 View Profile View Forum Posts Registered User Join Date Sep 2011 Posts 7 Unanswered: ORA-27102: out of memory on Linux, unable to startup instance Hello , I am trying to startup my DB but its showing me error.. SQL> startup open; ORA-27102: out of memory Linux-x86_64 Error: out of memory 12: Cannot allocate memory Additional information: 1 Additional information: 140017670 Additional information: 8 I am using RHEL 5.3 with 64 bit. uname -a :- Linux test 2.6.18-128.el5 #1 SMP Wed Dec 17 11:41:38 EST 2008 x86_64 x86_64 x86_64 GNU/Linux kernel.shmall = 4294967296 kernel.shmmax = 68719476736 [oracle@test ~]$ getconf PAGE_SIZE 4096. Can anyone resolve this issue. Regards Anas. Reply With Quote 12-13-11,14:01 #2 anacedent View Profile View Forum Posts Registered User Join Date Aug 2003 Location Where the Surf Meets the Turf @Del Mar, CA Posts 7,776 Provided Answers: 1 >I am trying to startup my DB but its showing me error.. When was last time DB started without error? What changed since then? post results from following OS command free post content of /etc/sysctl.conf You can lead some folks to knowledge, but you can not make them think. The average person thinks he's above average! For most folks, they don't know, what they don't know. Good judgement comes from experience. Experience comes from bad judgement. Reply With Quote 12-17-11,07:56 #3 anas343 View Profile View Forum Posts Registe
to true. Usually you get following Error message.
SQL> startup
SQL> ORA-27102: out of memory
Linux-x86_64 Error: 12: Cannot allocate memory
The problem it ulimit -l You have to set it in /etc/security/limits.conf and relogon to the system and restart database.
cat /etc/security/limits.conf
...
oracle soft memlock unlimited
oracle hard memlock unlimited
alter system set lock_sga=true scope=spfile;
shutdown immediate
startup
And you SGA stays in physical memory. If you SGA gets pages out you will encounter following waits. Wait Event: latch: shared pool Comments (2) July 28, 2010 ORA-27102: out of memory Linux-x86_64 Error: 28: No space left on device Filed under: oracle -- Tags: linux, Linux-x86_64 Error: 28, No space left on device, ORA-27102: out of memory, shmall, shmmax -- admin @ 8:55 am Problem:
SQL> startup nomount
ORA-27102: out of memory
Linux-x86_64 Error: 28: No space left on device
There are 64G physical memoray avaliable. shmmax is set to 52G But still its not possibel to start the Oracle instance with more than 30G SGA. Solution: kernel.shmall is set to small.
cat /proc/sys/kernel/shmall
8248733
getconf PAGE_SIZE
4096
This means that only 8248733 memory pages can be allocate. 4096 x 8248733 = 32G To allocate 50G we need to set shmall to at least 13107200 Comments (3) Popular Tags10.2.0.4 allocation asm bzip2 CPU patch data block datapump deadlock error flashback archive impdp memory multi core multi cpu mysql optimizer ORA-27102: out of memory oracle oracle blog parallel parallel dml pbzip2 perfomance performance pipelined pipelined function pl/sql relink all resize datafile row chaining rowlength row migration solaris sqlnet sql profile sql tuning set sts swap system error 12 system statistics t