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It then explains core database instance behavior in memory, including background and server (foreground) processes for parsing and executing SQL and returning results. The document outlines major System Global Area components such as SGA data/control storage, shared pool caching, flashback buffer usage, and buffer cache and related performance structures.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/oracle-database-19c-technical-architecture-license-architecture-overview/655982/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/oracle-database-19c-technical-architecture-license-architecture-overview/655982.png","ImageObject",300,407,{"name":92,"@type":93},"Rhys","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-25",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the key restrictions and limitations described in the license notice?","Question",{"text":112,"@type":113},"The text limits use and disclosure, prohibits many forms of copying or modification, and restricts reverse engineering, disassembly, or decompilation unless required by law for interoperability.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What defines an Oracle database instance in this document?",{"text":117,"@type":113},"A database instance contains Oracle Database background processes and memory structures, and it exists only in memory, centering on the SGA and Program Global Areas (PGAs).",{"name":119,"@type":110,"acceptedAnswer":120},"Which major components within the SGA are described?",{"text":121,"@type":113},"The document highlights the SGA memory area and calls out shared pool, flashback buffer (optional), buffer cache, and smart flash cache (optional), explaining their roles in caching and flashback behavior.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},655982,1793051657,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":36,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},687207024643,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","Oracle Database 19c Technical Architecture  \nCopyright © 2019, Oracle and/or its affiliates. All rights reserved.  \nThis software and related documentation are provided under a license agreement containing restrictions on use and disclosure and are protected by intellectual property laws. Except as expressly permitted in your license agreement or allowed by law, you may not use, copy, reproduce, translate, broadcast, modify, license, transmit, distribute, exhibit, perform, publish, or display any part, in any form, or by any means. Reverse engineering, disassembly, or decompilation of this software, unless required by law for interoperability, is prohibited.  \nThe information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing.  \nIf this is software or related documentation that is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, then the following notice is applicable:  \nU.S. GOVERNMENT END USERS: Oracle programs, including any operating system, integrated software, any programs installed on the hardware, and/or documentation, delivered to U.S. Government end users are\"commercial computer software\" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, use, duplication, disclosure, modification, and adaptation of the programs, including any operating system, integrated software, any programs installed on the hardware, and/or documentation, shall be subject to license terms and license restrictions applicable to the programs. No other rights are granted to the U.S. Government.  \nThis software or hardware is developed for general use in a variety of information management applications. It isnot developed or intended for use in any inherently dangerous applications, including applications that may create a risk of personal injury. If you use this software or hardware in dangerous applications, then you shall be responsible to take all appropriate fail-safe, backup, redundancy, and other measures to ensure its safe use. Oracle Corporation and its affiliates disclaim any liability for any damages caused by use of this software or hardware in dangerous applications.  \nOracle and Java are registered trademarks of Oracle and/or its affiliates. Other names may be trademarks of their respective owners.  \nIntel and Intel Xeon are trademarks or registered trademarks of Intel Corporation. All SPARC trademarks are used under license and are trademarks or registered trademarks of SPARC International, Inc. AMD, Opteron, the AMD logo, and the AMD Opteron logo are trademarks or registered trademarks of Advanced Micro Devices. UNIX is a registered trademark of The Open Group.  \nThis software or hardware and documentation may provide access to or information about content, products, and services from third parties. Oracle Corporation and its affiliates are not responsible for and expressly disclaim all warranties of any kind with respect to third-party content, products, and services unless otherwise set forth in an applicable agreement between you and Oracle. Oracle Corporation and its affiliates will not be responsible for any loss, costs, or damages incurred due to your access to or use of third-party content, products, or services, except as set forth in an applicable agreement between you and Oracle.  \nDatabase Instance  \nDatabase Server  \nDatabase Instance  \nSystem Global Area (SGA)  \nA database instance contains a set of Oracle Database background processes and memory structures. The main memory structures are the System Global Area (SGA) and the Program Global Areas (PGAs) . The background processes operate on the stored data (data files) in the database and use the memory structures todo their work. A database instance exists only in memory.  \nOracle Database also creates server processes to handle the connections to the database on behalf o","cbCaierWqL8sTTe5","https://ap.wps.com/l/cbCaierWqL8sTTe5","pdf",898317,"English","# License and legal notices\n## Oracle trademarks and third-party content disclaimers\n# Database instance fundamentals\n## Memory-only instance model\n## Foreground and background processes\n# System Global Area (SGA) components\n## Shared pool\n## Flashback buffer\n## Buffer cache\n## Smart Flash Cache","[{\"question\":\"What are the key restrictions and limitations described in the license notice?\",\"answer\":\"The text limits use and disclosure, prohibits many forms of copying or modification, and restricts reverse engineering, disassembly, or decompilation unless required by law for interoperability.\"},{\"question\":\"What defines an Oracle database instance in this document?\",\"answer\":\"A database instance contains Oracle Database background processes and memory structures, and it exists only in memory, centering on the SGA and Program Global Areas (PGAs).\"},{\"question\":\"Which major components within the SGA are described?\",\"answer\":\"The document highlights the SGA memory area and calls out shared pool, flashback buffer (optional), buffer cache, and smart flash cache (optional), explaining their roles in caching and flashback behavior.\"}]","Oracle Database 19c Technical Architecture - License & Architecture Overview | PDF",1792965324,101]