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Zabbix Tutorial-zabbix configuration file detailed

the situation to increase or decrease this value. javagateway=127.0.0.1 #JavaGateway的ip地址或主机名JavaGatewayPort =10052 #JavaGateway的端口号StartJavaPollers =5 #开启连接javagatey的进程数SNMPTrapperFile =/tmp/zabbix_traps.tmpstartsnmptrapper=0 #如果设置为1,snmp The trapper process will open the listenip=0.0.0.0 #监听来自trapper的ip地址ListenIP =127.0.0.1housekeepingfrequency=1# Description: How many hours to clean up the proxy-side database history,alert,andalarms to keep the proxy-side database lightweight, it is recomme

Installing CDH with Cloudera Manager 5.6

already has a low-level version, perform the following command to uninstall it: -e mysql --nodepsAnd then install:rpm -ivh MySQL-server-5.5.28-1.linux2.6.x86_64.rpm Configure MY.CNFIf the/etc/my.cnf file does not exist, you can execute the following command to generate a touch /etc/my.cnfThe content inside can use the recommended configuration values in the document:[Mysqld]transaction-isolation = read-committed # Disabling Symbolic-links is recommended to prevent assorted se

LVM2 Common usage Explanation

creation of PV is very simple, using the command pvcrete directly behind the partition, hard disk or RAID device you want to create, here is/dev/sda5 and/dev/sda6Pvcreate/dev/sda5/dev/sda6# #使用pvs和pvdisplay查看pv~]# PVsPV VG Fmt Attr PSize pfree/dev/sda2 vg0 lvm2 a--59.99g 7.99g/DEV/SDA5 lvm2---11.01g 11.01g/dev/sda6 lvm2---9.01g 9.01g(PVs and Pvdisplay can display PV information, but PVS displays brief information, Pvdisplay displays details.) All PV is displayed without parameters. /dev/sda2 is

Test Disk performance with IOzone

size is 4G, record block from 2k to 8m, and output test data to Excel file [[emailprotected]] #/opt/iozone/bin/iozone-a-S 4g-i 0-i 1-f/tmp/testfile-y 2k-q 8m-rb output.xls iozone:performance Test of Fil e I/O Version $Revision: 3.408 $ Compiled for the + bit mode. Build:linux Contributors:william Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rh INE, Mike Wisner, Ken Goss Steve l

stm8s---Long key recognition for external interrupt applications

(_asm ("rim\n");), is 00; When an interrupt occurs, the current interrupt (ITC_SPRX) is loaded into i[1:0], mainly used to do the interrupt priority; Exit interrupt Auto-Clear 0 Therefore, in writing EXTI_CR1, you need to configure the ITC_SPRX to 11, or join the no interrupt command.EXTI_CR1:?? Configure the way to promote the hair;Test code#include CharKeyflag;CharKeypressstatus =1;unsigned intKeycount;/*output pin*/_boolPD2 @PD_ODR:2;_boolPC7 @PC_ODR:7;_boolPC6 @PC_ODR:6;_boolPC3 @PC_ODR:3;/

PHP File upload You must know a few points, _php tutorial

PHP File upload You must know a few points, This article mainly describes the PHP file upload with the relevant configuration of knowledge points. The php file Upload function Configuration mainly involves the upload_tmp_dir,upload_max_filesize,post_max_size and other options in the php.ini configuration file. The following one by one illustrates. Open the PHP.ini configuration file to find File Uploadsfile_uploads = onHTTP file uploads are allowed by default, and this option cannot be set to

PHP reasonable configuration to achieve file upload

write permissions. Upload_max_filesize = 2M The maximum size of the uploaded file. The default value of this option is 2M, that is, file upload size is 2M, if you want to upload a 50M file, you must set upload_max_filesize = 50M.However, only setting upload_max_filesize = 50M will not enable uploading of large files, and we must also modify the Post_max_size option in the php.ini file. Max_file_uploads = 20 Set the maximum number of files allowed to upload at one time Continue to find Data

Linux Kernel vmalloc region size Calculation

config_provide_ohci1394_dma_initFix_ohci1394_base,# Endif_ End_of_fixed_addresses};Each enumeration represents one or more pages,Except for nr_cpus, we take 1, and the maximum values of all others cannot exceed 1 K pages.That is to say, the fixed ing cannot exceed 4 MB Next is the permanent ing area. Let's look at the starting address definition of the permanent kernel ing.# Define pkmap_base (fixaddr_boot_start-page_size * (last_pkmap + 1) pmd_mask)That is to say, the starting address of the

Configure PHP.ini to implement PHP file upload function, _php tutorial

, such as Upload_tmp_dir = "D:/fileuploadtmp", The representative has a fileuploadtmp directory under the D-Disk directory, and reads and writes permissions to this directory. Upload_max_filesize = 2M The maximum size of the uploaded file. The default value of this option is 2M, that is, file upload size is 2M, if you want to upload a 50M file, you must set upload_max_filesize = 50M.However, only setting upload_max_filesize = 50M will not enable uploading of large files, and we must also modify

PHP sample program code for uploading files (suitable for beginners)

" ["type"]. "echo "Size:". ($_files["Attach_file"] ["size"]/1024). "Kbecho "Temp file:". $_files["Attach_file" ["Tmp_name"]. "if (file_exists ("upload/". $_files["Attach_file" ["Name"])) {echo $_files["Attach_file" ["Name"]. "already exists."} else {Move_uploaded_file ($_files["Attach_file"] ["Tmp_name"], "upload/" $_files["Attach_file"] ["name"]);echo "Stored in:". Upload/". $_files["Attach_file" ["Name"];}}} else {echo "Invalid file";}?> The above script detects if the file already ex

Usage of the preg_match_all function in php

platform? In the Apache configuration file httpd.conf, enable "Include conf/extra/httpd-mpm.conf" (delete the previous comment #), and then in the httpd-mpm.conf file Mpm_winnt_module "Threadstacksize 8400000" is set in the configuration module (approx. 8M). Code to copy the code as follows The code is as follows Copy Code Threadstacksize 8400000Threadsperchild 200Maxrequestsperchild 10000Win32disableacceptex

Linux Foundation Small case----use of LVM

, FDISK/DEV/SDCFDISK/DEV/SDDCreate a physical volume, PVCREATE/DEV/SDC1PVCREATE/DEV/SDD1Physical Volume View: PvscanCreate a volume group; vgcreate VG111/DEV/SDC1/DEV/SDD1 Create a volume group named vg111, containing two physical volumes, SDC1,SDD1 Volume Group view: VgdisplayExample: Vgcreate-s 8M VFAST_VG/DEV/SDB1/DEV/SDCCreate Logical Volume: Lvcreate-l 5g-n lv222 vg111-l partition Capacity-L Specify how many pe-n specify the logical volume nameLv

iis+php upload file size limit and upload time limit, IIS7 and iis8 upload file size limit and upload time limit

; executiontimeout="1850" /> in order to set php.ini Here's the configuration. Open php.ini, first find file_uploads = ON, whether to allow the switch to upload files over HTTP. The default is on is open Upload_tmp_dir, the file is uploaded to the server where temporary files are stored, if not specified will be used the system default temporary folder Upload_max_filesize = 8m; Wang Wen Business, that is, allow the maximum size of the upload

MySQL optimized My.ini configuration detailed explanation

, and avoid the problem of long SQL execution The default is 16M, and when the MySQL client or mysqld server receives a packet larger than max_allowed_packet byte, it emits a "packet too large" error. and close the connection. For some clients, if the communication packet is too large, a "lost connection to the MySQL server" error may be encountered during query execution. The default value is 16M. #dev-doc:http://dev.mysql.com/doc/refman/5.5/en/packet-too-large.html Max_allowed_packet = 32M

Memory optimized configuration for low memory server lamp

#innodb_log_file_size = 5M#innodb_log_buffer_size = 8M#innodb_flush_log_at_trx_commit = 1#innodb_lock_wait_timeout = 50[Mysqldump]QuickMax_allowed_packet = 16M[MySQL]No-auto-rehash# Remove The next comment character if you are not familiar with SQL#safe-updates[Isamchk]Key_buffer = 8MSort_buffer_size = 8M[Myisamchk]Key_buffer = 8MSort_buffer_size = 8M[Mysqlhotcop

CENTOS7 Mysql 5.6 Multiple Master one from solution with detailed configuration _linux

socket=/tmp/mysql.sock [mysqld] Port = 3306 Basedir =/usr/local /mysql DataDir =/data/mysql Character-set-server = utf8mb4 Default-storage-engine = InnoDB socket =/tmp/mysql.sock skip- Name-resolv = 1 Open_files_limit = 65535 Back_log = Max_connections = max_connect_errors 100000 E = 2048 Tmp-table-size = 32M max-heap-table-size = 32M #query-cache-type = 0 query-cache-size = 0 external-locking = FAL SE Max_allowed_packet = 32M Sort_buffer_size = 2M Join_buffer_size = 2M Thread_cache_size = Wuyi

nginx:413 Request Entity Too Large Processing Method--Modify PHP upload file size _nginx

Development environment: CentOS + Nginx + PHP + MySql + phpmyadmin In the use of phpMyAdmin SQL database import, often need to upload large SQL data files, and at this time will often encounter Nginx error: 413 Request Entity Too Large. To solve this problem, depending on the size of the uploaded data file, you need to adjust the parameter configuration in two locations: 1, php default upload file size limit of 2M, if more than 2M you need to modify the PHP configuration file php.ini inside t

MySQL configuration optimization (multiple parameters) _mysql

| + ———————— + ————-+ There are 27,813,678,764 index read requests, 6,798,830 requests are not found in memory read the index directly from the hard disk, the probability of the index misses the cache is computed: Key_cache_miss_rate =key_reads/key_read_requests * 100%, set at about 1/1000 better The default configuration value is 8388600 (8M) and the host has 4GB memory, which can be tuned to 268435456 (256MB). 5) Query_cache_sizeUsing query bu

Phpadmin How to import and export large data files and php.ini parameter modification _php tips

Recently encountered the database when the Phpadmin import problem, the new version of the Phpadmin import limit is 8M, the old version of the possible 2M, my database has dozens of trillion how can this be done? First of all, if you have a stand-alone server or VPS can be found under Apache php.ini This file to modify this 8M or 2M restrictions, how to modify it? Search to, modify these three Copy

MySQL DBA system Learning (4) Multiple instances of MySQL multi start stop

/mysqlbug script! 3, configure mysqld multiple instance my.cnf files (1) The configuration my.cnf file detailed explanation [Root@test4 ~]# cat/etc/my.cnf [Mysqld_multi] mysqld =/usr/local/mysql/bin/mysqld_safe mysqladmin =/usr/local/mysql/ Bin/mysqladmin user =test password =test [client] #password = your_password Port = 3306 Socket = /tmp/mysql.sock [mysqld3306] Port = 3306 socket =/tmp/mysql3306.sock skip-external-locking Key_buffe R_size = 16M Max_allowed_packet = 1M Table_open_cache =

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