Saturday, May 4, 2019

ORA-04030: out of process memory when trying to allocate 4024 bytes (kxs-heap-b,kghsseg_1 : kokeibib)

Normally users see ORA-04030 error with shortage of RAM, small PGA and kernel parameter config.

 ORA-04030: out of process memory when trying to allocate 4024 bytes (kxs-heap-b,kghsseg_1 : kokeibib)
 Non critical error ORA-48913 caught while writing to trace file "/u01/home/oracle/diag/rdbms/ORCL/ORCL/incident/incdir_8937/ORCL_ora_11258_i8937.trc"
 Error message: ORA-48913: Writing into trace file failed, file size limit [5242880] reached
 ORA-04030: out of process memory when trying to allocate 169040 bytes (pga heap,kgh stack)
 ORA-04030: out of process memory when trying to allocate 4024 bytes (kxs-heap-b,kghsseg_1 : kokeibib)
 Non critical error ORA-48913 caught while writing to trace file "/u01/home/oracle/diag/rdbms/ORCL/ORCL/incident/incdir_8938/ORCL_ora_11258_i8938.trc"
 Error message: ORA-48913: Writing into trace file failed, file size limit [5242880] reached

Users can refer metalink Note 233869.1 titled "Diagnosing and Resolving ORA-4030 errors"

By looking the error it is clear that “out of process memory”, where oracle cannot get the required RAM. But note that you need to analyze the trace to find out the root cause

In my case I found that one of the un-optimized PL/SQL job consuming the resources and caused the issue.

Current SQL Statement for this session (sql_id=gjn38xnrxcfbj) -----
BEGIN procedure_1(:1 , :2 , :3 , :4 , :5 , :6 , :7 , :8 , :9 , :10 , :11 , :12 , :13 , :14 , :15 , :16 , :17 , :18 , :19 , :20 , :21 ) ; END;

57% pid 67: 4089 MB used of 4092 MB allocated <= CURRENT PROC
Dump of Real-Free Memory Allocator Heap [0x7f2c640b4000]
mag=0xfefe0001 flg=0x5000003 fds=0x6 blksz=65536
blkdstbl=0x7f2c640b4010, iniblk=66560 maxblk=524288 numsegs=115
In-use num=65424 siz=4290117632, Freeable num=0 siz=0, Free num=1 siz=20512768

In our case max_map_count value is not enough and needs to investigage why the pl/sql processes requires such a alarge amout of memory. In this case adjusting PGA_AGGREGATE_TARGET or MEMORY_TARGET will not limit the size processes can grow.

To find out current vale of max_map_count run below command

$cat /proc/sys/vm/max_map_count
65530

To change the value run below command
sysctl -w vm.max_map_count= <greater than 65530>

Increase the value by following metalink note
Modification of "vm.max_map_count" on Oracle Linux 6 (Doc ID 2195159.1)

Regards,
Satishbabu Gunukula, Oracle ACE
http://www.oracleracexpert.com

13 comments:

  1. Nice blog shared in the above post, I really liked it and very useful for me. Keep doing the great work.

    7 tips to start a career in digital marketing

    “Digital marketing is the marketing of product or service using digital technologies, mainly on the Internet, but also including mobile phones, display advertising, and any other digital medium”. This is the definition that you would get when you search for the term “Digital marketing” in google. Let’s give out a simpler explanation by saying, “the form of marketing, using the internet and technologies like phones, computer etc”.

    we have offered to the advanced syllabus course digital marketing for available join now

    more details click the link now

    https://www.webdschool.com/digital-marketing-course-in-chennai.html

    ReplyDelete
  2. This blog more useful sharing contents.

    Web designing trends in 2020

    When we look into the trends, everything which is ruling today’s world was once a start up and slowly begun getting into. But Now they have literally transformed our lives on a tremendous note. To name a few, Facebook, Whats App, Twitter can be a promising proof for such a transformation and have a true impact on the digital world.

    we have offered to the advanced syllabus course web design and development for available join now

    more details click the link now

    https://www.webdschool.com/web-development-course-in-chennai.html

    ReplyDelete
  3. Great idea...Its headquarters in Dak Bhawan, Sansad Marg, New Delhi.Its located in 155,015 places across the country. India Post Payments Bank(IPPB) is the subsidiary of Post office Recruitment 2020 . ..

    ReplyDelete
  4. I really appreciate the kind of topics you post here. Thanks for sharing us a great information that is actually helpful. Good day!

    DevOps Training in Hyderabad

    ReplyDelete
  5. Thanks for valuable information , keep posting Salesforce Course In Pune

    ReplyDelete