ora-7445 exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to obj

 近日对数据库告警日志进行例行巡检经常发现如下报错信息：

操作系统solaris （swap空间的重要性)

Wed Aug 17 09:11:54 CST 2016

Errors in filearsystem_p064_22926.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file /p054_22734.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file /bdump/arsystem_p084_24753.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file /bdump/arsystem_p114_25753.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file /bdump/arsystem_p104_25577.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file arsystem/bdump/arsystem_p014_21437.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file/bdump/arsystem_p130_27934.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file /bdump/arsystem_p074_23139.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

Errors in file /bdump/arsystem_p034_22211.trc:

ORA-07445: exception encountered: core dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7FFDC00

0] [] []

Wed Aug 17 09:11:54 CST 2016

查看系统日志信息报错如下：

WARNING: Sorry, no swap space to grow stack for pid 22211 (oracle)

Aug 17 09:11:47  genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 27243 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 22609 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 28314 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 21104 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 28322 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 28316 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 28320 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 25200 (oracle)

Aug 17 09:11:47 genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid 28251 (oracle)

根据报错信息查询到metalink如下：

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ORA-7445 [ksmpgd_init_ctx()+4] during DataPump Import (文档 ID 1333547.1)

In this Document

Symptoms

Cause

Solution

References

This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) process and therefore

has not been subject to an independent technical review.

APPLIES TO:

Oracle Server - Enterprise Edition - Version: 10.2.0.5.0 and later [Release: 10.2 and later ]

Information in this document applies to any platform.

SYMPTOMS

During a DataPump import the following error is generated in a parallel slave:

ORA-07445: Exception occurred: CORE Dump [ksmpgd_init_ctx()+4] [SIGSEGV] [Address not mapped to object]

[0xFFFFFFFF7FFDA000] [] []

CAUSE

The machine is out of swap space. The system error log file will show messages like:

Jun 9 00:24:54 dodona genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid

15520 (oracle)

Jun 9 00:24:54 dodona genunix: [ID 470503 kern.warning] WARNING: Sorry, no swap space to grow stack for pid

22587 (oracle)

SOLUTION

1. Increase the swap space.

In the Document 169706.1 are the different recommended values for each platform / Oracle version.

REFERENCES

NOTE:169706.1 - Oracle Database on Unix AIX,HP-UX,Linux,Mac OS X,Solaris,Tru64 Unix Operating Systems

Installation and Configuration Requirements Quick Reference (8.0.5 to 11.2)

一般都为在并发进程p00x报错。 

增加系统的swap空间问题得到解决。