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the cause:
bug,related to name resolution issues, bind buffer length, fine grained access control, cursor invalidation, or any of the other common structural or coding reasons for multiple child cursors
DB_FILE_MULTIBLOCK_READ_COUNT is one of the parameters you can use to minimize I/O during table scans. It specifies the maximum number of blocks read in one I/O operation during
When he tried deleting archivelog manually with RMAN on primary db host, he got following warning:
“归档日志未删除, 因为备用或上游捕获进程需要它”
除了linux中长用的vmstat,iostat,top,sar等工具外有两组轻量的工具也值的推荐，
一个就是经典的IBM 的nmon+nmonanalyser
另一个是Collectl+Graphite
Memory Notification: Library Cache Object loaded into SGA
Heap size 106084K exceeds notification threshold (51200K)
KGL object name …
When job execution fails, the SNP processes attempts to rerun the job one minute later. If this run fails, another attempt is made in two minutes and another in four minutes. The job queue doubles the retry interval until it exceeds the normal execution interval..
Total updates 12.00
Total deletes 0.00
Total discards 0.00
Total operations 13.00
Total update collisions 12.00
0 db block gets
0 consistent gets
0 physical reads
0 redo size
0 bytes sent via SQL*Net to client
0 bytes received via SQL*Net from client
0 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
62 rows processed
SQL> ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;
ALTER DATABASE ADD SUPPLEMENTAL LOG DATA
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [kcbgcur_9], [8388681], [25],
[100663296], [33554432], [], [], []
在公司累脑子，出来奉献点儿体力，顺便也当散散心缓解一下，接了个苦差事，从9月20号开始出差浙江两周，最近也已经跑了几个地方，只是好久没出来，换地后一连一周多了没有晚上睡好觉过，浙江给我的印象是处处在盖楼，处处在铺路，处处在建高架，处处在挖地铁，有钱人多，还有以下资源beautiful scene and beautiful girl… 最近很辛苦，更新要一直到10月9号后了，这段时间从未再沾一下ORACLE.
3 begin
4 hdl := dbms_datapump.attach(‘SYS_IMPORT_FULL_03′,’SYSTEM’);
5 DBMS_DATAPUMP.STOP_JOB(hdl,1,0);
6 end;
alter system set control_files=’+DATA/ANBOB/CONTROLFILE/current.260.793738081′,’+DATA/ANBOB/CONTROLFILE/current.261.793738087′,’+DATA/ANBOB/CONTROLFILE/current.276.793737555′ scope=spfile;
Control Seq=53995=0xd2eb, File size=594=0x252
File Number=0, Blksiz=16384, File Type=1 CONTROL
Logical block number 1 (header block)
数据文件如果有2g，先create一个大表占了1G,后来建了个几M小表，再把大表drop 掉加purge选项，向把数据文件resize到100M，往往会失败，在磁盘紧张的情况下，想知道数据文件最小值是多少？就要计算datafile HWM
其中有两个编号段比较特殊
1，错误编号-10000到-10999 不是真正的错误，是保留下来用于debug使用
2，错误编号-20000到-20999是自定义异常，错误信息最大2048B
HANG ANALYSIS:
==============
Open chains found:
Chain 1 : :
<0/1777/32406/0x5275fca0/13913/SQL*Net message from client>
— <0/1477/37455/0x5275e4e8/16043/enq: TX - row lock contention>
SQL> shutdown immediate
ORA-00600: internal error code, arguments: [3708], [910], [], [], [], [], [], []
Basically this error is raised because LGWR timmed out.
ksedmp: internal or fatal error
ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [], [], [], []
对于每个数据库不同级别的错误可以做不同的处理，如短信、邮件等
在Excel中有时有需求，需要像数据库一样，做两个sheet或文件的关联，把一个表中匹配Key的值更新到当前Key的某一列，不想让把excel那么多字段导入db，就可以利用伟大的excel 公式做到实现