dataguard备库出现GAP修复
dataguard备库出现GAP修复 1. 产生原因 巡检发现备库的日志应用有滞后的情况 DGMGRL> show database sxcmpdg 'RecvQEntries'STANDBY_RECEIVE_QUEUE {代码...} 去备库查询滞后情况 select * from v$archive_gap; THREAD# LOW_SEQUENCE# HIGH_SEQUENCE#---------- ------------- -------------- {代码...} 去broker中查...
2017-09-04
答:HTML5 canvas 怎么画半圆
先translate,然后moveto,再arc就可以。画个扇形
2016-10-25
ARC3001 illustrated reflective
The second summative assessment point in ARC3001 requires you to develop an illustrated reflective report - a 1000 word critical reflection on your design practice, illustrated primarily by your own design work and supported by concepts and theories encountered in your own reading and/or through ...
2025-02-18
问:使用百度导航SDK时,报ARC错误
~/BaiDuSDK/BaiduNav/BaiduStatistics/TouchJSON/JSON/CSerializedJSONData.m:47:7: 'release' is unavailable: not available in automatic reference counting mode
2016-05-07
YashanDB归档日志文件管理
单机和分布式部署形态下的归档日志默认的文件格式为arch\_{resetlogs\_id}\_{sequence}.ARC。其中resetlogs\_id对于没有做过不完全恢复的数据库该值一般为0,sequence为归档日志的序列号。
2025-03-14
答:Canvas 弧度转为百分比问题、求指教
context.arc(250, 250, 200, 0.7 * Math.PI, 0.7 * Math.PI + 1.6 * Math.PI / 100 * n);
问:ARC下在dealloc中将对象置空,这个做法必要吗?
ARC下在dealloc中将对象置空,这个做法必要吗?重写dealloc,并且将类的property置未空,这个做法有用吗?
2016-07-02