log 1

Recently, ORACLE databases in oracle are unstable. by querying the ORACLE alert Log, the following error message is displayed: Thread1cannotallocatenewlog, sequence%922checkpointnotcompletecurrentl Recently, ORACLE databases in oracle are unstable.

In mysql, UNION and UNIONALL are used to merge the result sets of two or more SELECT statements. But the difference between the two is that union will automatically compress the repeated results in multiple result sets, while unionall will display

In mysql, union is used to merge the result sets of two or more SELECT statements. orderby is used to sort the result sets according to certain rules. This article uses these two statements together, describes how to use orderby in union. The

Save the hardware usage to the file. 1. write the script executed every minute. Www.2cto.com [root @ PLASPACSHCNV4 ~] # Crontab-e */1 ***** uptime & gt;/root/cpu. log */1 ***** free-m & gt;/root/memory. log */1 **... Save the hardware usage to the

When switching the role of the logical standby database switchover, the following error message is displayed in the log when the database is started, which is recorded; primarygt; startupOraclei When switching the role of the logical standby

Generalized linear ModelWe have given examples of regression and classification in the preceding example. In the example of regression, $y \mid x;\theta \sim N (U,\sigma ^{2}) $, in the classification example, $y \mid x;\theta \sim Bbernoulli (\phi)

Logistic regressionTypically a two-tuple classifier (also available for multivariate classification), such as the following classification problems Email:spam/not spam Tumor:malignant/benign Suppose (hypothesis): $ $h _\theta (x) =

This course (MOOCULUS-2 "sequences and Series") was taught by Ohio State University on the Coursera platform in 2014.PDF textbook Download sequences and SeriesThis series of learning notes PDF download (academia.edu) MOOCULUS-2 solutionSummary

ORA-16014 and ORA-00312 troubleshooting When switching the role of the logical standby database switchover, the following error message is displayed in the log when the database is started; Primary> startupOracle instance started. Total System

Nohup command AnalysisTo put a command in the background for execution, we generally use nohup sh command && I know that this command is executed in the background. What does nohup do?This starts from the unix signal. The unix signal mechanism can

JavaScript Math and Number objects, javascriptmath 1. Math object 1.1 Introduction A Math object is a mathematical object that provides mathematical calculations for data, such as getting absolute values and getting rounded up. No constructor and

One, restore the non-current log group[Email protected] primarydb]$ RM-RF redo01*[Email Protected]:~>startupORACLE instance started.Total System Global area 285212672 bytesFixed SIZE 1218992 bytesVariable SIZE 96470608 bytesDATABASE buffers 184549376

build against network-gan 1. Gan Foundation Essence Picture BuilderComposition: D: Discriminant network; G: Generate network; Loss: The probability of a real model: yes/no truth. Mathematical Principles Among them, Z: uniformly distributed

MySQL log-records operations and information during MySQL database operationLog role(1) When the database has been accidentally damaged, you can query the cause of the error through the log file.(2) Using log files for data recoveryLog

This article mainly uses instance parsing to better understand the execution rules of try, catch, and finally in js. It has good reference value. Let's take a look at try: the error of the statement test code block, put the code that may cause

(1) manually simulate the deletion of onlinelog in inactive state. SQLgt; select * fromv $ log; SQLgt; alterdatabaseopen * (1) manually simulate the deletion of onlinelog in inactive state. SQLgt; select * from v $ log; SQLgt; alter database open *

Ora-27037: unabletoobtainfilestatusLinux-x86_64Error: 2: Nosuchfileordirectory why is there no archive? Who deleted it? Ora-27037: unable to obtain file statusLinux-x86_64 Error: 2: No such file or directory why is there No archive? Who deleted it?

It is found that project log processing by O & M colleagues is convenient and worth learning. Even in the development environment, this process is good.For example, the project RTP is deployed under the/home/www/RTP directory.Create the/usr/userfile/

Bash programming Basics I. The origin of Bash 1. What is Bash? shell Bash is GNU Bourne-again shell, which is used by most Linux distributions. Shell is an interface provided by * nix for users. The underlying layer of an operating system runs

Title: What is syslogd. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 　　 1. What is syslogd? Syslogd can be