Unable to change MEMORY_MAX_TARGET (无法修改MEMORY_MAX_TARGET)
alter system set memory_max_target=0 scope=spfile;
shutdown immediate
startup
SQL> show parameter target
…
memory_max_target big integer 3824M
Logon Storm and Memory shortage issue ORA-07445 dbgtrReserveSpace (记录一次登录风暴致内存不足的问题)
Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x10] [PC:0x938E8C5, dbgtrReserveSpace()+99] [flags: 0x0, count: 1]
Errors in file /oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_ora_13864.trc (incident=60801):
ORA-07445: exception encountered: core dump [dbgtrReserveSpace()+99] [SIGSEGV] [ADDR:0x10] [PC:0x938E8C5] [Address not mapped to object] []
Incident details in: /oracle/diag/rdbms/ora11g/ora11g/incident/incdir_60801/ora11g_ora_13864_i60801.trc
Use ADRCI or Support Workbench to package the incident.
SHELL:Find Memory Usage In Linux (统计每个程序内存使用情况)
shell统计linux系统中每个程序的内存使用情况，因为内存结构非常复杂，不一定100%精确，
scn format (scn格式)
scn(system change number) 结构主要维护 oracle数据库内部的数据一致性，SCN 有两部分组成: Base and wrap，wrap 是16bit的数字，base是32bit的数字,这样其实就可以算scn的有效范围，它的格式(redo dump trace)是wrap.base，当base超过了2的32次方,然后wrap 就会加1，其实用sql 很好验证。
SQL Test Case Builder generate test case automatically(自动生成SQL所需测试数据)
Why SQL Test Case Builder? For most SQL problems, the s […]
ORA-00313,ORA-00312,ORA-27037,ORA-19527 DATAGARD 11G r2
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
DDE: Problem Key ‘ORA 312’ was flood controlled (0x5) (no incident)
ORA-00312: online log 2 thread 1: ‘/oracle/oradata/icme/redo02.log’
Error 19527 creating/clearing online redo logfile 2
Send email using utl_smtp in Oracle 11g (results in ORA-24247)(11g ACL 网络访问控制列表)
ORA-24247: network access denied by access control list (ACL)
ORA-06512: at “SYS.UTL_TCP”, line 17
ORA-06512: at “SYS.UTL_TCP”, line 267
OGG-01028 Oracle GoldenGate Capture for Oracle,Table compression is not supported
2013-09-29 10:03:15 ERROR OGG-01028 Oracle GoldenGate Capture for Oracle, eicmec.prm: Object with object number 81069 is compressed. Table compression is not supported.
Oradebug Security
DEMO 1,How to use oradebug to call OS commands via the database
DEMO 2,Disable sys audit
How to imp job to another schema in same db(同一数据库导入JOB到另外一用户)
ORA-39083: Object type JOB failed to create with error:
ORA-00001: unique constraint (SYS.I_JOB_JOB) violated
Goldengate source and target table differ in column structure part-2(ogg同步不同的表结构数据)
map icme.test_s, target icme.test_t,
COLMAP(usedefaults,
create_date =@IF(@STREQ(@GETENV(“GGHEADER”,”OPTYPE”),”INSERT”),@DATENOW(),@COLSTAT(MISSING)),
last_update_date=@datenow()
Goldengate source and target table differ in column structure part-1(ogg同步不同的表结构数据)
昨天一朋友问如果用GOLDENGATE同步数据(ETL)，如果目标端比源端多出一个时间字段表示最后的修改日期， […]
Dynamically Changing shared_pool_size fail!(动态修改Shared pool size失败)
因安装数据库时启用了ASMM,过了几天发现分配不太理想想禁用ASMM，手动调整shared_pool_size, 这是一个动态参数，修改后立即生效无需重启数据库实例，但修改时遇到了比较奇怪的现象。
Install ZABBIX On Linux 5 监控安装配置(pdf)
•What is zabbix ?
•What can it monitor?
•Structure of ZABBIX and Componentes
ORA-07445 [kggchk()+77] [SIGSEGV] [Address not mapped to object]
今天有个项目系统负载突然变大，查到top sql是一个存储过程,执行计划缺少合理的索引，SQL是个update […]
export data from 11g and import into 10G R2 ORA-01455
EXP-00008: ORACLE error 1455 encountered
ORA-01455: converting column overflows integer datatype
EXP-00000: Export terminated unsuccessfully
Dynamic SQL Supports Statements Length Characters Limit (execute immediate sql长度限制)
有时需要在plsql 写一些动态sql,用execute immediate 或dbms_sql 调 用，但是execute immediate 后动态sql 文本的长度限制是多少呢？
To hold the latch manually, DB hang demo(手动持用latch使数据库hang)
It is widely known that the Oracle server uses kslgetl – Kernel Service Lock Management Get Latch function to acquire the latch,oradebug call kslgetl/kslfre can be used to acquire the latch manually. This is very useful to simulate latch related hangs and contention.
