[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-07-31 (世界標準時間)。"],[],[],null,["# Recommended Java memory settings\n\nThe memory allocated to the Looker application on customer-hosted instances is specified in the Looker startup script.\n\nYou can download the latest startup script, `looker`, at the [looker-open-source GitHub repo](https://github.com/looker-open-source/customer-scripts/tree/master/startup_scripts). When you download the startup script, move it into the same directory as the `looker.jar` file (generally `/home/looker/looker`). For more information, see the [Installing the Looker application](/looker/docs/installing-looker-application#install_the_looker_application) documentation page.\n\nThe startup script automatically determines how much java memory to allocate to Looker. However, if you would like to customize this value manually, you can follow these instructions.\n\nChanging Looker's memory allocation\n-----------------------------------\n\nTo change the memory allocated to Looker, edit these lines for Java heap and metaspace memory allocation in the startup script: \n\n JAVAMEM=\"2300m\"\n METAMEM=\"800m\"\n\nThen, restart the application: \n\n ./looker restart\n\nFor smaller instances dedicated to Looker, the memory allocated should be approximately two thirds of the available memory. On larger instances this ratio can be increased.\n\nIf too much memory is allocated:\n\n- Looker may fail to start\n- The system generally may suffer performance issues\n\nIf too little memory is allocated:\n\n- Looker may fail to start\n- Looker specifically may suffer performance issues\n\nCommon instance types\n---------------------\n\nThe following table lists the recommended memory settings for a number of common instance sizes:"]]
