1.出现根本原因.man malloc By default, Linux follows an optimistic memory allocation strategy. This means that when malloc() returns non-NULL there is no guarantee that the memory really is availab
经常会出现这样的场景:有一张3亿的表,现在要对这张表进行删除1亿行,于是有人开始运行delete from table limit 100000000; 毫无疑问这是一个愚蠢的删除方式,于是有人开始变更删除方式:delete from table where id<100000000; 然而运行一段时间后,又发现批量删除的效率可能会更高,所以kill掉了上一条运行了一段时间的sql,开始批量删除,
一般情况下,在杀一个会话的时候,直接执行alter system kill session ‘sid,serial#’; Administrator's Guide说,当session是active的时候,alter system kill session 只是将session标识为killed 或者pseudo状态,并不会释放session持有的资源,所以我们在执行完alter sy
The emulator process for AVD Pixel_2_API_29 was killed 报错描述: 第一次安装Android studio好不容易解决gradle启动模拟器又出现了以下错误 The emulator process for AVD Pixel_2_API_29 was killed 原因一: 需要安装Intel x86 Emulator Accel
1.下面的语句用来查询哪些对象被锁: select object_name,machine,s.sid,s.serial# from v$locked_object l,dba_objects o ,v$session s where l.object_id = o.object_id 2.下面的语句用来杀死一个进程:alter system kill session '966
The emulator process for AVD Pixel_2_API_29 was killed 报错描述: 第一次安装Android studio好不容易解决gradle启动模拟器又出现了以下错误 The emulator process for AVD Pixel_2_API_29 was killed 原因一: 需要安装Intel x86 Emulator Accel
如何解决The emulator process for AVD was killed. 之前按照别人的博客将环境变量设置成 结果.android文件会被显示在avd文件夹下,后面我将环境变量去掉后面avd目录,.android文件夹就会生成在sdk根目录下,看着舒服多了 变量名:ANDROID_SDK_HOME(千万别弄错) 变量值:D:\android-sdk-windows\and
题目链接:Who killed Cock Robin 题目描述: Who killed Cock Robin? I, said the Sparrow, With my bow and arrow,I killed Cock Robin. Who saw him die? I, said the Fly.With my little eye,I saw him die. Who caught hi
链接:https://www.nowcoder.com/acm/contest/104/C来源:牛客网 题目描述 由于系统限制,C题无法在此评测,此题为现场赛的D题 Who killed Cock Robin? I, said the Sparrow, With my bow and arrow,I killed Cock Robin. Who saw him d