Ora-27102 Out Of Memory Linux Error 12
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- ORA-27102: out of memory Linux-X86_64 Error: 28: No space left on device SQL> startupORA-27102: out of memoryLinux-x86_64 Error: 28: No space left on
Ora-27102 Out Of Memory Windows
deviceI have used RHEL X86_64 + memory (32GB) and setted sga_max_size=20G + sga_target=20G ora 27102 out of memory linux x86_64 error 12 cannot allocate memory additional information and ...$ cat /proc/sys/kernel/shmmax26843545600What wrong with my kernel tuning... So, I checked metalink (301830.1) and some recommend from RHELThey
Ora-27102 Out Of Memory Additional Information
told; set SHMALL to the total amount of physical RAM divided by page size.SHMALL =>Total amount of shared memory available (bytes or pages)then:Check Page Size:$ getconf PAGE_SIZE4096Determine the system wide maximum https://community.hpe.com/t5/System-Administration/Linux-Error-12-Cannot-allocate-memory/td-p/4699467 number of shared memory pages:$ cat /proc/sys/kernel/shmall2097152My system 64bits with memory 32GB, then 1024 * 1024 * 1024 * 32 / 4096 = 8388608So, change kernel.shmall = 8388608$ su - root # echo 8388608 > /proc/sys/kernel/shmallOr modify /etc/sysctl.conf file:kernel.shmall=8388608and # sysctl -pAfter changed... check and startup database again:$ cat /proc/sys/kernel/shmall8388608SQL> startup...--- NO ERROR ---By the way, I read Tuning Red Hat Enterprise http://surachartopun.com/2009/10/shared-memory-tuning-startup-database.html Linux: Oracle and Oracle RACFrom this idea with memory 32GBmem=$(free|grep Mem|awk '{print$2}')totmem=$(echo "$mem*1024"|bc)huge=$(grep Hugepagesize /proc/meminfo|awk '{print $2}')max=$(echo "$totmem*75/100"|bc)all=$(echo "$max/$huge"|bc)echo "kernel.shmmax = $max" echo "kernel.shmall = $all" Result:kernel.shmmax = 25213120512, kernel.shmall = 12311094However, This case "ORA-27102: out of memory Linux-X86_64 Error: 28: No space left on device" , solved by set SHMALL = MemTotal(byte)/PAGE_SIZE and ...I hope to hear your idea about kernel tuning with Oracle Database. เขียนโดย Surachart Opun ที่ 10:14 PM ป้ายกำกับ: 10g, linux, ora, oracle No comments: Post a Comment Newer Post Older Post Home Subscribe to: Post Comments (Atom) View Surachart Opun's profile (surachart at gmail dot com) Search This Blog Loading... Feed Me! Posts Atom Posts Comments Atom Comments Blog Archives Blog Archives 09/11 - 09/18 (1) 01/17 - 01/24 (1) 05/24 - 05/31 (2) 12/21 - 12/28 (1) 11/30 - 12/07 (1) 11/16 - 11/23 (2) 10/26 - 11/02 (1) 10/19 - 10/26 (1) 10/05 - 10/12 (2) 09/28 - 10/05 (1) 09/21 - 09/28 (3) 09/14 - 09/21 (1) 09/07 - 09/14 (1) 08/24 - 08/31 (2) 07/27 - 08/03 (1) 06/29 - 07/06 (1) 06/22 - 06/29 (1)
11.2.0.2.0Any idea what the issue is?ERROR:ORA-01034: ORACLE not availableORA-27102: out of memoryLinux-x86_64 Error: 12: Cannot allocate memoryAdditional information: 1Additional information: 786432Additional information: 8Process ID: 0Session ID: 0 Serial number: 0John reply Tweet Search Discussions Search All Groups oracle-l 9 responses Oldest Nested Hans Forbrich Is this a new installation or has it worked before? First guess is that you do not have the shared memory and semaphores configured - should be in /etc/sysctl.conf /Hans Hans Forbrich at Mar 12, 2014 at 12:48 pm ⇧ Is this a new installation or has it worked before?First guess is that you do not have the shared memory and semaphoresconfigured - should be in /etc/sysctl.conf/HansOn 12/03/2014 4:51 AM, John Dunn wrote:I am getting the following error on RHEL 5.4 Oracle XE 11.2.0.2.0Any idea what the issue is?ERROR:ORA-01034: ORACLE not availableORA-27102: out of memoryLinux-x86_64 Error: 12: Cannot allocate memoryAdditional information: 1Additional information: 786432Additional information: 8Process ID: 0Session ID: 0 Serial number: 0*John * reply | permalink John Dunn This is what I have : # Controls the maximum shared segment size, in bytes kernel.shmmax = 68719476736 # Controls the maximum number of shared memory segments, in pages kernel.shmall = 4294967296 ########### # Oracle Database 11g Express Edition Recommended Values kernel.sem = 250 32000 100 128 fs.file-max = 6815744 ######## John Dunn Product Consultant Sefas Innovation Limited. Tel: + 44 (0) 117 910 0529 www.sefas.com From: [email protected] On Behalf Of Hans Forbrich Sent: 12 March 2014 12:47 John Dunn at Mar 12, 2014 at 12:51 pm ⇧ This is what I have :# Controls the maximum shared segment size, in byteskernel.shmmax = 68719476736# Controls the maximum number of shared memory segments, in pageskernel.shmall = 4294967296############ Oracle Database 11g Express Edition Recomm