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Zabbix_server surface started successfully, but no process

:/system.slice/zabbix_server.service nbsp;├─22316/usr/local/zabbix/sbin/zabbix_server ├─22318/usr/local/zabbix/ Sbin/zabbix_server:configuration Syncer [Waiting sec for processes] ├─22319/u Sr/local/zabbix/sbin/zabbix_server:db watchdog [Synced Alerts config in 0.001065 sec, idle sec] N Bsp ├─22320/usr/local/zabbix/sbin/zabbix_server:poller #1 [go

Oracle Frequent generate a lot of cdmp * directories contain * bucket trace in bdump problem analysis

-------------------------------------------------------------------------------Current SQL:Client details:O/S info: user: weblogic, term: unknown, ospid: 1234Machine: qmweb86 program: JDBC Thin ClientApplication name: JDBC Thin Client, hash value = 2546894660Current Wait Stack:0: waiting for 'SQL * Net message from client'Driver id = 0x74637000, # bytes = 0x1, = 0x0Wait_id = 55 seq_num = 56 snap_id = 1Wait times: snap = 4.499210 sec, exc = 4.4

Linux MySQL 5.7.23 Master-slave Replication (asynchronous replication)

Affected (0.00 sec) Query O K, 0 rows Affected (0.00 sec) Query OK, 0 rows Affected (0.00 sec) Query OK, 0 rows Affected (0.00 sec) Query OK, 0 rows Affe CTED (0.00 sec) Query OK, 0 rows Affected (0.00 sec) Query OK, 0 rows Affec

Mysql database locking mechanism detailed introduction _mysql

storage engine, allow MySQL to handle locked processing directly to the storage engine itself, holding only write_allow_ in MySQL The lock of the write type. Since the locking mechanism used by the MyISAM storage engine is entirely a table-level lock provided by MySQL, we will use the MyISAM storage engine as the sample storage engine to illustrate some of the basic features of table-level locking. Because, in order to make the example more intuitive, I'll use the display to add a lock to the

SQL Server R2 Performance counter detailed list (i)

Original: SQL Server R2 Performance counter detailed list (i)SQL Server Backup Device counters:Can monitor the Microsoft SQL Server backup device for backup and restore operations SQL Server Backup Device counters Description Device Throughput Bytes/sec The throughput (in bytes per second) of the read and write operations used by a backup device to back up or restore the database. Th

IIS Monitoring Metrics

The IIS Global active flushed Entries active flushed Entries is a cached file handle that closes after the current transfer is complete. The IIS Global object.Web Anonymous users/sec The number of anonymous connections that users make through the Web service.the number of BLOB cache refreshes that IIS Global blob cache flushes since the server started.Total number of successful lookups in the IIS Global blob cache Hits blob caches.IIS Global blob cach

MySQL terminal (Terminal) Management database, data table, data basic operation (GO)

table2.4.2 alter Modify table (column) field2.4.3 Delete drop table (column) field2.4.4 Rename renaming table names2.5 Create new table with existing data3. Operation and management of data3.1 Add data (Increase)3.2 Deleting data (delete)3.3 Modifying data (change)3.4 Query data (check)4. Management view1. Database management1.1 CREATE Database Create Database Firstdb; 1.2 Show view all databases mysql> show databases; +--------------------+ | Database |

Windows Performance Counters

Performance Counter Analysis Object Counter Analysis Processor %processor time Recommended threshold Value 85% Memory Available bytes The recommended threshold value is less than 4MB to add memory; In addition, it is recommended that you have at least 10% of the physical memory value Pages reads/sec Page reads/sec refers to the num

MySQL terminal (Terminal) command basic operation

Tags: date orm modify table hint har rom drop number displayNote: The MySQL database command is not case sensitive. But in the Mac terminal, if you want to use the tab auto-Complete command, then you have to use uppercase, so that the Mac terminal will help you complete the command, otherwise you press N times tab will not respond. 1. Database management 1.1. Create Database Create Database Firstdb; 1.2. Show view all databases mysql> show databases; +--------------------+ | Database

MySQL transaction-to-transaction isolation

transaction_tbl for testing:CREATE TABLE transaction_tbl (id int (4)) Engine=innodb; INSERT into Transaction_tbl value (1), insert into Transaction_tbl value (2), insert into TRANSACTION_TBL value (3), insert I NTO transaction_tbl Value (4); INSERT into Transaction_tbl value (5);The ability to turn off auto-commit during normal use is enabled by default systemMysql> SHOW GLOBAL VARIABLES like ' autocommit ';+---------------+-------+|variable_name |Value |+---------------+-------+|autocommit | O

Summary of some important MySQL performance indicator calculation and optimization methods, mysql performance indicator

Summary of some important MySQL performance indicator calculation and optimization methods, mysql performance indicator 1 QPS calculation (queries per second) For databases dominated by MyISAM Engines MySQL> show GLOBAL status like 'questions';+---------------+------------+| Variable_name | Value |+---------------+------------+| Questions | 2009191409 |+---------------+------------+1 row in set (0.00 sec)mysql> show global status like 'uptime';+--

Implement terminal management MySQL database on Mac

Open terminal and enter the following command: /usr/local/mysql/bin/mysql-u root-p Where Root is the user name. The following command appears: Enter Password: At this point, if you do not change the password, directly hit enter. Otherwise, enter your password.This will allow you to access your database server. 1, the operation and management The base of the data table Database management 1.1 CREATE Database Create Database Firstdb; 1.2 Show view all databases Mysql> Show databases;+---------

MySQL Common operation statement (2: Start, connect database and user actions)

Label:Below is a summary of the commonly used MySQL operation statements (Win7) below: 1. Database Management 1.1 CREATE Database Create Database Firstdb; 1.2 Show view all databases mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | Firstdb | | mysql | | performance_schema | +--------------------+ 4 rows in Set (0.00 sec) 1.3 alter modifies the database The ALT

MySQL lock mechanism and transaction control

disconnects the client. The set autocommit can modify the way the current connection is submitted, and if set autocommit=0, all the transactions after Setup need to be committed or rolled back by explicit commands. If we only need transaction control over certain statements, it is convenient to start a transaction using start transaction, so that the transaction can be automatically returned to autocommit after the end, if we want all of our transactions to be not autocommit, It is con

Data manipulation for MySQL

1. Inserting Datainserting a single row of data ( inserts a single row of data if the found statement contains a set keyword)GrammarInsert into table_name setfield 1>= value 1,field 2>= value 2,field 3>= value 3;First look at the table structuremysql> desc T1;+-------+-------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+-------+-------------+------+-----+---------+-------+| ID | Int (11) | YES | | NULL | || name | varchar (20) | YES | | NULL | |+-------+--

Lesson three--sql operations and data types

keyword is the filter for the condition after the categorized result; having and where is the difference: having is a condition filter for the results of the aggregation, Where is the filtering of records prior to aggregation, and if logic allows, it is recommended to use where to filter as much as possible, because the result set is reduced, the efficiency of the aggregation is greatly increased, and then the logical view of whether to re-filter the 6) Table connection: Table joins are di

MySQL thing series: 3:innodb_flush_log_at_trx_commit Small Experiment

Label:1: Creating Tables and stored procedures mysql> CREATE Database Trx; Query OK, 1 row affected (0.02 sec) mysql> use TRX Database changed mysql> CREATE TABLE Test_trx ( - Gt ID int (5), uname char (+)), engine =innodb; Query OK, 0 rows affected (0.01 sec) mysql> DROP PROCEDURE IF EXISTS pro_trx $$ Query OK, 0 rows affected (0.00 SEC) mysql> DE

MySQL performance indicator calculation and Optimization

MySQL performance indicator calculation and Optimization1 QPS computing (queries per second) for databases dominated by the MyISAM Engine Mysql> show GLOBAL status like 'questions ';+ --------------- + ------------ +| Variable_name | Value |+ --------------- + ------------ +| Questions | 2009191409 |+ --------------- + ------------ +1 row in set (0.00 sec) Mysql> show global status like 'uptime ';+ --------------- + -------- +| Variable_name | Value |

Testing the bandwidth of gigabit NICs in CentOS

1-w 448 k-t 600 The server displays the following information: [4] local 10.10.10.22 port 5001 connected with 10.10.11 port 56251 [ID] Interval Transfer Bandwidth [4] 0.0-1.0 sec 112 MBytes 941 Mbits/sec [4] 1.0-2.0 sec 112 MBytes 941 Mbits/sec [4] 2.0-3.0 sec

Performance counters monitored by LR

Guidance: Memory: memory usage may be the most important factor in system performance. If the system frequently switches pages, the memory is insufficient. "Page Swap" is a unit called "page". It moves code and data blocks of a fixed size from Ram to a disk to release memory space. Although some page switches enable Windows 2000 to use more memory than actually, they are acceptable, but frequent page exchanges will reduce system performance. Reducing page switching significantly increases the sy

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