search
HomeBackend DevelopmentPHP Tutorial做定时任务时,怎么解决服务器内存不够用啊?

<code> 
 ignore_user_abort(true);
 set_time_limit(0);
 
 $b = str_repeat(' ', 10000);
 
 $i = 0;
 
 ob_start();
 while (true) {
     sleep(1);
     file_put_contents('sf.txt', date('Y-m-d H:i:s') . $i . "\r\n", FILE_APPEND);
 
     echo $i,$b,'<br>';
     ob_flush();
     flush();
 }
 </code>
<code>
没想到几秒钟 Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 133437441 bytes) in /data/home/hyu1658240001/htdocs/a.php on line 16 就这样了 啊啊啊啊

我只是想做一个定时任务,不断的检测超时支付的订单,以实现自动关闭超时订单,为什么不行啊???

在线等大神指点啊,时间限制我已经取消了,是不是有个配置内存不受限制的啊?

</code>

回复内容:

<code> 
 ignore_user_abort(true);
 set_time_limit(0);
 
 $b = str_repeat(' ', 10000);
 
 $i = 0;
 
 ob_start();
 while (true) {
     sleep(1);
     file_put_contents('sf.txt', date('Y-m-d H:i:s') . $i . "\r\n", FILE_APPEND);
 
     echo $i,$b,'<br>';
     ob_flush();
     flush();
 }
 </code>
<code>
没想到几秒钟 Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 133437441 bytes) in /data/home/hyu1658240001/htdocs/a.php on line 16 就这样了 啊啊啊啊

我只是想做一个定时任务,不断的检测超时支付的订单,以实现自动关闭超时订单,为什么不行啊???

在线等大神指点啊,时间限制我已经取消了,是不是有个配置内存不受限制的啊?

</code>

你没确定脚本有问题?

单独跑脚本确定没问题?

先确定脚本的问题吧。

报错误不一定是内存不够用,可能是你逻辑问题,给你多少内存都会崩。

你这是死循环 改其他方案

file_put_contents函数是一直占用内存的

用linux的定时任务去执行php脚本

使用sleep(2),将程序休息几秒钟

我用的oracle job 存储过程,只不过频率低. 或者在使用订单时条件触发.毕竟只有使用时才需要考虑是否有效

用nodejs来跑

了解到你的目的是:能够自动关闭超时未支付的订单

可以试着换个思路来解决:
把定时任务改为: 每次用户点击订单相关页面时,检测下是否有超时未支付的订单。如果有,则将它们关闭。

crontab

拆分放到任务队列执行

1.你需要把程序改成php-cli方式运行,即试用php命令来执行。例如:/usr/local/php/bin/php index.php
2.把脚本里面while循环更改掉,试用crontab来执行该脚本,当php脚本执行完后,整个php脚本的运行内存就被回收就不会出现内存溢出的问题了。

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How to make PHP applications fasterHow to make PHP applications fasterMay 12, 2025 am 12:12 AM

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

PHP Performance Optimization Checklist: Improve Speed NowPHP Performance Optimization Checklist: Improve Speed NowMay 12, 2025 am 12:07 AM

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

PHP Dependency Injection: Improve Code TestabilityPHP Dependency Injection: Improve Code TestabilityMay 12, 2025 am 12:03 AM

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

PHP Performance Optimization: Database Query OptimizationPHP Performance Optimization: Database Query OptimizationMay 12, 2025 am 12:02 AM

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi

Simple Guide: Sending Email with PHP ScriptSimple Guide: Sending Email with PHP ScriptMay 12, 2025 am 12:02 AM

PHPisusedforsendingemailsduetoitsbuilt-inmail()functionandsupportivelibrarieslikePHPMailerandSwiftMailer.1)Usethemail()functionforbasicemails,butithaslimitations.2)EmployPHPMailerforadvancedfeatureslikeHTMLemailsandattachments.3)Improvedeliverability

PHP Performance: Identifying and Fixing BottlenecksPHP Performance: Identifying and Fixing BottlenecksMay 11, 2025 am 12:13 AM

PHP performance bottlenecks can be solved through the following steps: 1) Use Xdebug or Blackfire for performance analysis to find out the problem; 2) Optimize database queries and use caches, such as APCu; 3) Use efficient functions such as array_filter to optimize array operations; 4) Configure OPcache for bytecode cache; 5) Optimize the front-end, such as reducing HTTP requests and optimizing pictures; 6) Continuously monitor and optimize performance. Through these methods, the performance of PHP applications can be significantly improved.

Dependency Injection for PHP: a quick summaryDependency Injection for PHP: a quick summaryMay 11, 2025 am 12:09 AM

DependencyInjection(DI)inPHPisadesignpatternthatmanagesandreducesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itallowspassingdependencieslikedatabaseconnectionstoclassesasparameters,facilitatingeasiertestingandscalability.

Increase PHP Performance: Caching Strategies & TechniquesIncrease PHP Performance: Caching Strategies & TechniquesMay 11, 2025 am 12:08 AM

CachingimprovesPHPperformancebystoringresultsofcomputationsorqueriesforquickretrieval,reducingserverloadandenhancingresponsetimes.Effectivestrategiesinclude:1)Opcodecaching,whichstorescompiledPHPscriptsinmemorytoskipcompilation;2)DatacachingusingMemc

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.