Differences between seaslog and monolog log systems, installation steps of seaslog [easy to understand]

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SeasLog Yes, it is C language-written PHP expanded memory bank , Powerful and high performance monolog It's far worse than this .

Common logging components

Suppose an interface , It says 5 Record log ,

about monolog It is 5 Write to disk operation , That is to say 5 Time IO,

In a high concurrency field , Log is written to disk ,

The disk of the machine IO , The Internet IO, Memory operations Will be right. CPU The load of causes pressure .

Brush the disk frequently ,CPU The occupancy rate will be too high due to log writing , Because of the logic of the interface itself 1. Reading and writing Mysql 2. Reading and writing Redis 3. Queue task There are already many networks IO And disk IO Operation .

that ,seasLog How does it work ？ As follows You can customize in the configuration file Every time N Time Log data is written to disk once Store in... Before writing to disk buffer in , In memory For the scene above amount to 5 Secondary disk IO It becomes a disk IO

1. High and sending logs will not become a performance bottleneck second QPS 8000

2. Built in log analysis and warning framework ( Off by default )( Mainly used to analyze Error journal ) A: Count the number of certain log levels B: View all logs at a certain log level C: Send log alarm by email

3. Support each log N Next time , Log data is written to disk ( Log buffer )

4. Support RequestId Request global id Differentiate request

5. Support cutting logs by time

I am a seaslog For the benefit of ,

After using this component , Solved our company's log pair CPU Occupation problem .

There is also the problem of link tracking , Thanks to the ( Overall RequestId)

This good thing , Share it with you .

Personally test the installation steps :

1. Download installation package :

sudo wget https://pecl.php.net/get/SeasLog-2.2.0.tgz

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decompression

sudo tar xzvf SeasLog-2.2.0.tgz 

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2. function phpize, Generate configure Compile the file

3 . To configure

sudo ./configure --with-php-config=/usr/local/php/bin/php-config

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4. Compile and install

sudo make && make install

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The extension is stored in /usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/ Under the table of contents

5. stay php.ini Add... To the file seaslog Expand

extension=seaslog.so

[SeasLog]
seaslog.default_basepath ="/tmp"
seaslog.default_logger = "default"
seaslog.disting_type = 1
seaslog.disting_by_hour = 1
seaslog.use_buffer = 1
seaslog.buffer_size = 100
seaslog.level = 8
seaslog.trace_error = 1
seaslog.trace_exception = 0

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6. restart PHP

 sudo service php-fpm reload

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7. Running results

<?php

SeasLog::setBasePath('/home/wwwlogs/seaslog');
//echo SeasLog::getBasePath();

SeasLog::setLogger('api');
echo SeasLog::getBasePath();
echo '<br>'.SeasLog::getLastLogger();

SeasLog::debug('test');
SeasLog::debug('this is a debug');
SeasLog::info('this is a info');
SeasLog::notice('this is a notice');
SeasLog::emergency('this is a emergency');

$data=SeasLog::analyzerCount();
echo '<pre>';
print_r($data);
echo '<pre>';

SeasLog::flushBuffer();
//SeasLog::log('info','this is info test');

echo phpinfo();

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common problem :

1.seaslog.level = 8 Record all log types , Given in muke.com seaslog.level = 0 Record all logs , Just the opposite , This is a pit

; Log level , The greater the number , The more logs recorded according to the level .
;0-EMERGENCY 1-ALERT 2-CRITICAL 3-ERROR 4-WARNING 5-NOTICE 6-INFO 7-DEBUG 8-ALL
; Default 8( All logs )
;
;    Be careful ,  This configuration item is from 1.7.0 The version began to change .
;    stay 1.7.0 Before the release ,  The smaller the number of this value , The more logs recorded according to the level : 
;   0-all 1-debug 2-info 3-notice 4-warning 5-error 6-critical 7-alert 8-emergency
;   1.7.0  Previous version , This value defaults to 0( All logs );
seaslog.level = 8

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seaslog.level = 8 Default logger level.The Default value was 8, it’s meaning SeasLog will record all of the level. Default recorder level default value is 8, It means SeasLog All levels will be recorded .

seaslog.level = 0 SeasLog will record which level EMERGENCY.

seaslog.level = 1 SeasLog will record which level EMERGENCY,ALERT.

seaslog.level = 2 SeasLog will record which level EMERGENCY,ALERT,CRITICAL.

seaslog.level = 3 SeasLog will record which level EMERGENCY,ALERT,CRITICAL,ERROR.

seaslog.level = 4 SeasLog will record which level EMERGENCY,ALERT,CRITICAL,ERROR,WARNING.

seaslog.level = 5 SeasLog will record which level EMERGENCY,ALERT,CRITICAL,ERROR,WARNING,NOTICE.

seaslog.level = 6 SeasLog will record which level EMERGENCY,ALERT,CRITICAL,ERROR,WARNING,NOTICE,INFO.

seaslog.level = 7 SeasLog will record which level EMERGENCY,ALERT,CRITICAL,ERROR,WARNING,NOTICE,INFO,DEBUG.

2.4.2 Log template description

Template defaults to ：seaslog.default_template = “%T | %L | %P | %Q | %t | %M”

The default format is {dateTime} | {level} | {pid} | {uniqid} | {timeStamp} | {logInfo}

Real case ：2020-05-09 10:31:58 | DEBUG | 10012 | 5eb6161dd598e | 1588991518.904 | debug journal

If the custom template is ：seaslog.default_template = “[%T]:%L %P %Q %t %M”

The custom log format is ：[{dateTime}]:{level} {pid} {uniqid} {timeStamp} {logInfo}

Real case ：[2020-05-09 10:31:58] :{DEBUG} {10012} {5eb6161dd598e} {1588991518.904}{debug journal }

PS：%L Must be in %M Before , That is, the log level is before the log content .

3.seaslog The common method of

Configuration method ：setBasePath,getBasePath,setLogger,getLastLogger

How to log ：log,info,notice,debug,warning,error

Log reading method ：analyzerCount,analyzerDetail

3.1 List of constants

SeasLog The log is divided into 8 A level

Level	Abbreviation	remarks
SEASLOG_DEBUG	DEBUG	debug Information 、 Fine grained information events
SEASLOG_INFO	INFO	Important events 、 Emphasize the running process of the application
SEASLOG_NOTICE	NOTICE	Events of general importance 、 The execution process is relatively INFO Level more important information
SEASLOG_WARNING	WARNING	There is a non error exception message 、 Potential exception information 、 Need attention and repair
SEASLOG_ERROR	ERROR	Errors at run time 、 It is not necessary to repair immediately 、 It does not affect the operation of the whole logic 、 It needs to be recorded and tested
SEASLOG_CRITICAL	CRITICAL	emergency 、 It needs to be repaired immediately 、 Program components are not available
SEASLOG_ALERT	ALERT	An emergency that requires immediate action 、 It is necessary to immediately notify relevant personnel for emergency repair
SEASLOG_EMERGENCY	EMERGENCY	System not available

3.2：SeasLog What is the performance of

A：

When SeasLog Don't open buffer when ,SeasLog yes ：syslog() Functional 8.6 times 、file_put_contents() Functional 240 times 、fwrite() In single case 36 times 、fwrite() Not in a single case 211 times 、monolog Don't open buffer At the time of the 41 times ; When SeasLog Turn on buffer And buffer_size by 100 when ,SeasLog yes ：syslog() Functional 250 times 、file_put_contents() Functional 6962 times 、fwrite() In single case 1052 times 、fwrite() Not in a single case 6127 times 、monolog Turn on buffer And buffer size by 100 At the time of the 118 times .

Official documents :https://github.com/Neeke/SeasLog/blob/master/README_zh.md

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