parameter中提取 基本参数请看如下链接: http://www.zhaibibei.cn/oralce/oracle-parameter/ 如无特殊说明数据库版本为11.2 db_block_checking 参数类型:字符串 语法:DB_BLOCK_CHECKING = { FALSE | OFF | LOW | MEDIUM | TRUE | FULL } 默认值:false 修改:修改不需要重启数据库
在前几篇关于Functor和Applilcative typeclass的讨论中我们自定义了一个类型Configure，Configure类型的定义是这样的...
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***************** db_block_checking与db_block_checksum两个参数都是对block进行检查，然而两者很容易混淆。 1.db_block_checking db_block_checking 是当block发生任何变化的时候进行逻辑上的完整性和正确性检查。该参数能够避免内存中数据块的损坏。 取决于对db_block_checking参数的设置。频繁的DML将使得块检查带来更多的开销。在系统 负荷允许的情形下建议设置为full。 不管db_block_checking和db_block_checksum这两个参数的值为何值，SYSTEM表空间都会进行做checking和checksum，可以通过隐含 参数_db_always_check_system_ts e. checking 则正好弥补了checksum的不足，它对数据块在内存提供一致性验证，确保每一个数据块的完整性。 f.
原因： 因为show full columns from table_xxx 展示的结果中会列出Privileges列的情况，表里有多少列就会出现多少次checking permissions检查。
发现还是进入不了图形界面，再次查看日志，发现卡在了 checking battery state 这个原因是因为gdm的问题，安装gdm sudo apt-get install gdm 在安装过程中会有配置选择
（1）插件管理页面提示：There were errors checking the update sites:IOException:Unable to tunnel through proxy.Proxy （2）插件管理页面提示：There were errors checking the update sites: SSLHandshakeException: sun.security.validator.ValidatorException
今天遇到了一个错误内容： RSA host key for x.x.x.x has changed and you have requested strict checking. key in /root/.ssh/known_hosts:1 RSA host key for x.x.x.x has changed and you have requested strict checking
在Go语言中常见100问题-#22 Being confused about nil vs. empty slices中分析了空切片和nil切片是有区别的，那如...
安装多线程“ pthreads”时，出现了一个这样的error错误： checking for ZTS… configure: error: pthreads requires ZTS, please
checking for c compiler default output file name... configure:error:C compiler cannot create executables
PATH=$PATH:$ERL_HOME/bin source /etc/profile （使配置生效） 测试erlang，命令行输入下面命令: erl ps:安装过程中我出现了这样的问题，checking
来自吴恩达深度学习系列视频 改善深层神经网络 - 第一周作业 1.3 3.Gradient+Checking。 github.com/Hongze-Wang/Deep-Learning-Andrew-Ng/tree/master/homework 戳这里看完整版 1-dimensional gradient checking difference = 2.919335883291695e-10 N-dimensional gradient checking def forward_propagation_n(X, Y, parameters
♣ 题目部分 在Oracle中，参数DB_BLOCK_CHECKSUM和DB_BLOCK_CHECKING的作用是什么？ ♣ 答案部分 何时进行数据块的一致性检查呢？ 块的一致性检查由DB_BLOCK_CHECKSUM和DB_BLOCK_CHECKING两个初始化参数控制。 DB_BLOCK_CHECKING参数（默认值为FALSE）主要用于数据块的逻辑一致性检查，但只是在块内，不包括块间的逻辑检查，用于防止在内存中损坏或数据损坏。 当启用DB_BLOCK_CHECKING时，可能会产生内部错误ORA-600[kddummy_blkchk]或者ORA-600[kdBlkCheckError]。 即使将DB_BLOCK_CHECKING值设置为FALSE，对于SYSTEM表空间也会进行相关的验证。 本文选自《Oracle程序员面试笔试宝典》，作者：小麦苗 ?
/usr/bin/gnumake checking for gnupatch... no checking for gpatch... no checking for gnutar... no checking yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking checking paths.h presence... yes checking for paths.h... yes checking sys/file.h usability... yes checking checking for bzero... yes checking for memset... yes checking for fgetln... yes checking for lockf.. . yes checking for flock... yes checking for setmode... yes checking for strcasecmp... yes checking for
features checking for epoll … found checking for EPOLLRDHUP … found checking for O_PATH … not found checking checking for sys/vfs.h … found checking for nobody group … found checking for poll() … found checking checking for statfs() … found checking for statvfs() … found checking for dlopen() … not found checking found checking for in_addr_t … found checking for in_port_t … found checking for rlim_t … found checking checking for accept4() … found checking for eventfd() … found checking for int size … 4 bytes checking
yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking ... yes checking for unistd.h... yes checking for dlfcn.h... yes checking for objdir... .libs checking (cached) yes checking for inline... inline checking for size_t... yes checking for uint16_t... yes checking (cached) yes checking for memset... yes checking for munmap... yes checking for socket... yes checking checking for strrchr... yes checking for strstr... yes checking for strtoul... yes checking that generated
... found checking for limits.h ... found checking for sys/filio.h ... not found checking for sys/param.h ... found checking for sys/mount.h ... found checking for sys/statvfs.h ... found checking for crypt.h ... found checking for Linux specific features checking for epoll ... found checking for EPOLLRDHUP ... found checking for O_PATH ... not found checking for sendfile() ... found checking for sendfile64 () ... found checking for sys/prctl.h ... found checking for prctl(PR_SET_DUMPABLE) ... found checking
/usr/bin/sed checking for cc... cc checking whether the C compiler works... yes checking for C compiler checking how to run the C preprocessor... cc -E checking for icc... no checking for suncc... no checking checking for sqlext.h in /usr//include... yes checking for isqlext.h in /usr//include... no checking checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for yes checking dlfcn.h usability... yes checking dlfcn.h presence... yes checking for dlfcn.h... yes checking
-std=gnu99 19 checking for g++... no 20 checking for c++... no 21 checking for gpp... no 22 checking for aCC... no 23 checking for CC... no 24 checking for cxx... no 25 checking for cc++... no 26 checking for cl.exe... no 27 checking for FCC... no 28 checking for KCC... no 29 checking for RCC... no 30 checking checking for ar... ar 58 checking for strip... strip 59 checking for ranlib... ranlib 60 checking command checking for sys/stat.h... yes 65 checking for stdlib.h... yes 66 checking for string.h... yes 67 checking
/usr/bin/file checking for ldd... no checking for bash... /bin/bash checking for cat... /bin/cat checking for chmod... /bin/chmod checking for cp... /bin/cp checking for cut... /bin/rm checking for rmdir... /bin/rmdir checking for sh... /bin/sh checking for sort... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking ... yes checking for stdint.h... yes checking for unistd.h... yes checking stdio.h usability... yes checking
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