{"id":13610,"date":"2022-07-27T09:24:22","date_gmt":"2022-07-27T16:24:22","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=13610"},"modified":"2025-06-13T17:32:02","modified_gmt":"2025-06-14T00:32:02","slug":"couchbase-mongodb-nosql-misconceptions-5","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-mongodb-nosql-misconceptions-5\/","title":{"rendered":"Couchbase vs MongoDB: equ\u00edvocos sobre NoSQL Parte 5"},"content":{"rendered":"<p><span style=\"font-weight: 400\">Os conceitos err\u00f4neos sobre NoSQL existem h\u00e1 muito tempo. Esta s\u00e9rie do blog est\u00e1 sendo conclu\u00edda com uma discuss\u00e3o sobre o que significa ser \"o mais temido\" e o que significa dar mem\u00f3ria a um banco de dados.<\/span><\/p>\n<p><span style=\"font-weight: 400\">N\u00e3o deixe de conferir as postagens anteriores desta s\u00e9rie:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-mongodb-nosql-misconceptions-1\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Parte 1: E quanto ao SQL? A curva de aprendizado \u00e9 \u00edngreme?<\/span><\/a><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-mongodb-nosql-misconceptions-2\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Parte 2: O Couchbase \u00e9 apenas um armazenamento de chave-valor? O Couchbase tem pesquisa Lucene?<\/span><\/a><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-mongodb-nosql-misconceptions-3\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Parte 3: O NoSQL \u00e9 seguro? Ele perder\u00e1 meus dados? E quanto ao ACID?<\/span><\/a><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-mongodb-nosql-misconceptions-4\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Parte 4: Dimensionamento e popularidade<\/span><\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Nesta postagem, examinarei novamente alguns dos <\/span><a href=\"https:\/\/web.archive.org\/web\/20210810020126\/https:\/\/www.mongodb.com\/mongodb-vs-couchbase\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">concep\u00e7\u00f5es err\u00f4neas que o MongoDB fez sobre o Couchbase e o NoSQL<\/span><\/a><span style=\"font-weight: 400\">.<\/span><\/p>\n<h2><b>O Couchbase \u00e9 o \"banco de dados mais temido\"?<\/b><\/h2>\n<p><a href=\"https:\/\/web.archive.org\/web\/20210810020126\/https:\/\/www.mongodb.com\/mongodb-vs-couchbase\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Mongo<\/span><\/a><span style=\"font-weight: 400\"> chama a aten\u00e7\u00e3o para a Pesquisa de Desenvolvedores do Stack Overflow de 2020, que agora est\u00e1 dois anos desatualizada. \u00c9 verdade que o Couchbase foi classificado em uma posi\u00e7\u00e3o baixa nessa pesquisa. No entanto, n\u00e3o \u00e9 porque os desenvolvedores marcaram uma caixa que dizia \"Eu temo esse banco de dados\" (isso \u00e9 inferido a partir de caixas de sele\u00e7\u00e3o sobre projetos planejados para o pr\u00f3ximo ano).<\/span><\/p>\n<p><span style=\"font-weight: 400\">Al\u00e9m disso, o nome \"Couchbase\" \u00e9 frequentemente confundido com o nome semelhante, mas muito diferente, \"CouchDB\" (um <\/span><a href=\"https:\/\/web.archive.org\/web\/20210810020126\/https:\/\/www.mongodb.com\/mongodb-vs-couchbase\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">suposi\u00e7\u00e3o err\u00f4nea comum de que at\u00e9 mesmo o Mongo fez<\/span><\/a><span style=\"font-weight: 400\"> em sua p\u00e1gina da Web). Isso foi comprovado com os resultados mais recentes do <\/span><a href=\"https:\/\/survey.stackoverflow.co\/2022\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Pesquisa com desenvolvedores 2022<\/span><\/a><span style=\"font-weight: 400\">que adicionou o CouchDB como uma op\u00e7\u00e3o distinta. Desde 2020, o Couchbase continuou a subir nos resultados das pesquisas de 2021 e 2022, com um aumento de mais de 11 pontos desde 2021.<\/span><\/p>\n<p><span style=\"font-weight: 400\">E ainda mais importante \u00e9 observar que, embora o Couchbase certamente tenha trabalho a fazer em termos de conscientiza\u00e7\u00e3o, os dois principais bancos de dados da pesquisa s\u00e3o o PostgreSQL e o Redis. Esses s\u00e3o dois bancos de dados que oferecem excelente suporte a SQL e armazenamento em cache, como dois produtos separados. Claramente, SQL e arquitetura memory-first s\u00e3o duas coisas que os desenvolvedores querem, e o Couchbase j\u00e1 re\u00fane essas coisas.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Para os 6.803 desenvolvedores que \"temem\" trabalhar com o Mongo, voc\u00ea pode considerar dar uma olhada no <\/span><a href=\"https:\/\/cloud.couchbase.com\/sign-up\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Couchbase Capella<\/span><\/a><span style=\"font-weight: 400\">Se voc\u00ea estiver procurando a flexibilidade do JSON e a familiaridade do SQL (afinal, duas das tr\u00eas principais linguagens da pesquisa s\u00e3o JavaScript e SQL).<\/span><\/p>\n<p><span style=\"font-weight: 400\">A Pesquisa para Desenvolvedores do Stack Overflow \u00e9 importante, e o Couchbase est\u00e1 sempre trabalhando para melhorar a experi\u00eancia do desenvolvedor. Se estiver interessado em outras pesquisas e pr\u00eamios em que o Couchbase se saiu bem, confira:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-trustradius-top-rated-awards-2022\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">TrustRadius mais bem avaliado<\/span><\/a><span style=\"font-weight: 400\">O pr\u00eamio \u00e9 concedido com base no feedback direto dos clientes<\/span><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.dbta.com\/Editorial\/Trends-and-Applications\/DBTA-100-2022-The-Companies-That-Matter-Most-in-Data-153094.aspx\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">DBTA 100<\/span><\/a><span style=\"font-weight: 400\"> - as empresas que mais importam, de acordo com a Database Trends and Applications<\/span><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.inspiring-workplaces.com\/stories\/top-50-inspiring-workplaces-across-emea-announced\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Os 50 melhores locais de trabalho inspiradores<\/span><\/a><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.crn.com\/slide-shows\/applications-os\/the-coolest-database-system-companies-of-the-2022-big-data-100\/3\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">As empresas de sistemas de banco de dados mais interessantes de 2022<\/span><\/a><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-database-leader-spring-2022-g2-reports\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">7 pr\u00eamios do G2<\/span><\/a><span style=\"font-weight: 400\">, um site de avalia\u00e7\u00e3o ponto a ponto<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A <\/span><a href=\"https:\/\/www.crn.com\/slide-shows\/cloud\/crn-s-2021-products-of-the-year\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Produto do ano<\/span><\/a><span style=\"font-weight: 400\"> do CRN.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Sim, ainda temos muito trabalho a fazer. Mas o Couchbase se preocupa com os desenvolvedores e continuar\u00e1 a desenvolver e melhorar para atender \u00e0s suas necessidades.<\/span><\/p>\n<h2><b>Todo banco de dados n\u00e3o pode usar mem\u00f3ria?<\/b><\/h2>\n<p><span style=\"font-weight: 400\">Esse \u00faltimo equ\u00edvoco \u00e9 sobre como os bancos de dados usam a mem\u00f3ria. Pode ser uma quest\u00e3o complexa, mas, de modo geral, o uso da mem\u00f3ria em bancos de dados se divide em duas categorias:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Armazenamento em buffer<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Armazenamento em cache<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Esses termos descrevem coisas muito diferentes, mas s\u00e3o frequentemente usados (erroneamente) de forma intercambi\u00e1vel.<\/span><\/p>\n<h3><b>O que \u00e9 um buffer?<\/b><\/h3>\n<p><span style=\"font-weight: 400\">Em poucas palavras, um <\/span><b>buffer<\/b><span style=\"font-weight: 400\"> \u00e9 usado para suavizar a velocidade com que os dados s\u00e3o movimentados. Os resultados de uma consulta podem ser colocados em um buffer, de modo que o cliente possa ler do buffer em vez de diretamente do processo de consulta. Depois que os resultados s\u00e3o consumidos, os dados n\u00e3o est\u00e3o mais no buffer.<\/span><\/p>\n<h3><b>O que \u00e9 um cache?<\/b><\/h3>\n<p><span style=\"font-weight: 400\">Por outro lado, <\/span><b>armazenamento em cache<\/b><span style=\"font-weight: 400\"> \u00e9 usado para fornecer acesso r\u00e1pido aos dados repetidamente. O resultado de uma pesquisa de valor-chave buscado no disco na primeira vez pode ser armazenado na mem\u00f3ria para a pr\u00f3xima vez que precisar ser acessado. Os dados permanecer\u00e3o no cache at\u00e9 serem \"invalidados\" (expirados, expulsos ou qualquer que seja o mecanismo de cache).<\/span><\/p>\n<p><span style=\"font-weight: 400\">Esta apresenta\u00e7\u00e3o de <a href=\"https:\/\/www.youtube.com\/watch?v=mXQ2uv63Wjk\" target=\"_blank\" rel=\"noopener\">UPS do cliente Couchbase<\/a> discute (entre outras coisas) a implementa\u00e7\u00e3o do Managed Cache do Couchbase e os benef\u00edcios de um cache gerenciado:<\/span><\/p>\n<p><iframe loading=\"lazy\" title=\"Destaque para o cliente: Casos de uso do Couchbase na UPS\" width=\"900\" height=\"506\" src=\"https:\/\/www.youtube.com\/embed\/mXQ2uv63Wjk?feature=oembed&#038;enablejsapi=1&#038;origin=https:\/\/www.couchbase.com\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"font-weight: 400\">\u00c9 verdade que quase todos os bancos de dados usam buffer e \u00e9 verdade que o espa\u00e7o para buffer pode ser ajustado, o que pode melhorar o desempenho. Mas N\u00c3O \u00e9 verdade que todo banco de dados tenha um cache gerenciado integrado. \u00c9 por isso que, por exemplo, o Redis (um sistema de cache) \u00e9 frequentemente combinado com bancos de dados que <\/span><i><span style=\"font-weight: 400\">n\u00e3o<\/span><\/i><span style=\"font-weight: 400\"> t\u00eam recursos de cache.<\/span><\/p>\n<p><span style=\"font-weight: 400\">O Couchbase tem um <em>cache gerenciado incorporado<\/em>Portanto, voc\u00ea n\u00e3o precisa instalar nenhuma ferramenta adicional para armazenamento em cache nem se preocupar com a falta de sincronia: \u00e9 tudo autom\u00e1tico.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Portanto, tenha isso em mente ao avaliar a configura\u00e7\u00e3o da mem\u00f3ria do banco de dados: ela afeta o armazenamento em buffer, o armazenamento em cache ou ambos?<\/span><\/p>\n<h3><b>Devo colocar tudo na mem\u00f3ria?<\/b><\/h3>\n<p><span style=\"font-weight: 400\">Bem, claro. Esse \u00e9 um caminho a seguir. Para determinados tamanhos de bancos de dados, isso \u00e9 vi\u00e1vel e econ\u00f4mico. Para bancos de dados maiores (por exemplo, v\u00e1rios terabytes), esse pode n\u00e3o ser o caminho mais econ\u00f4mico. E, de qualquer forma, talvez voc\u00ea nem esteja usando uma quantidade suficiente desses dados regularmente.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Entre: O novo <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/low-tco-with-couchbase\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Mecanismo de armazenamento de magma<\/span><\/a><span style=\"font-weight: 400\">que pode oferecer suporte a v\u00e1rios terabytes para seus dados com uma taxa de mem\u00f3ria para dados de apenas 1%.<\/span><\/p>\n<h2><b>O que vem a seguir?<\/b><\/h2>\n<p><span style=\"font-weight: 400\">Obrigado por ler esta s\u00e9rie sobre conceitos err\u00f4neos de NoSQL.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Quer discutir mais? Voc\u00ea \u00e9 bem-vindo a participar do <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-on-discord\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Disc\u00f3rdia do Couchbase<\/span><\/a><span style=\"font-weight: 400\"> para mais conversas, perguntas e respostas com a equipe e a comunidade do Couchbase. Confira tamb\u00e9m o novo <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/introducing-the-couchbase-community-hub\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\">Centro Comunit\u00e1rio do Couchbase<\/span><\/a><span style=\"font-weight: 400\">.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Os conceitos err\u00f4neos sobre NoSQL existem h\u00e1 muito tempo. Esta s\u00e9rie do blog est\u00e1 sendo conclu\u00edda com uma discuss\u00e3o sobre o que significa ser \"o mais temido\" e o que significa dar mem\u00f3ria a um banco de dados. Certifique-se de [...]<\/p>","protected":false},"author":71,"featured_media":12777,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1816,6319,9417,1812],"tags":[9699,1309,9639,1725,9601],"ppma_author":[8937],"class_list":["post-13610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-couchbase-server","category-customers","category-performance","category-n1ql-query","tag-in-memory","tag-mongodb","tag-mongodb-query","tag-nosql-database","tag-stack-overflow"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.7.1 (Yoast SEO v25.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Memory Usage in Databases: Buffering &amp; Caching (Part 5)<\/title>\n<meta name=\"description\" content=\"This blog series is now wrapping up with a discussion of what it means to be &quot;most dreaded&quot; and what it means to give memory to a database.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-mongodb-nosql-misconceptions-5\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Couchbase vs MongoDB: NoSQL Misconceptions Part 5\" \/>\n<meta property=\"og:description\" content=\"This blog series is now wrapping up with a discussion of what it means to be &quot;most dreaded&quot; and what it means to give memory to a database.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.couchbase.com\/blog\/pt\/couchbase-mongodb-nosql-misconceptions-5\/\" \/>\n<meta property=\"og:site_name\" content=\"The Couchbase Blog\" \/>\n<meta property=\"article:published_time\" content=\"2022-07-27T16:24:22+00:00\" \/>\n<meta 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