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Creating sort index时间过长

WebMar 31, 2024 · However, this query takes over 3 hours to execute, SHOW FULL PROCESSLIST shows "Creating sort index" and almost 95% of the time it is creating sort index. EXPLAIN SHOWS. Select type: DEPENDENT SUBQUERY table: hi type: index possible keys: NULL key: hst_idx_sym_date_hp key_len: 32 ref: NULL rows: 1002718 … WebDec 5, 2016 · SQLのクエリを実行するとき、ボトルネックになりがちな演算の1つにソートがあります。 全レコードを並び替えるため、レコード数が多ければ多いほどそのコストも増大していきます。 ソートが発生するケースはいろいろありますが、代表的なのは「...

Solved: MySql 5.6 slow Creating Sort Index Experts Exchange

WebFeb 5, 2016 · 1. I have a simple MySQL 5.6.23 GROUP BY query that is taking 32 seconds to run on an RDS db.r3.xlarge instance. The InnoDB table has about 47M rows. explain says I'm selecting about 8K of them. The final GROUP BY output has 86 rows. According to show processlist; 99% of the time is spent on Creating sort index. http://blog.itpub.net/29863023/viewspace-2629893/ toddler 1st birthday https://boxh.net

每次都在creating sort index 这个步骤卡死 怎么办-CSDN社区

WebOct 30, 2024 · Hello, My website has been down for the past 8 hours – at least. My hosting provider says it is because of the following queries: 502106 dicafasd_2 dedi731.jnb2.host-h.net:49380 dicafasd_db2 Query 2 Sending data SELECT post_id, meta_key, meta_value FROM mb_postmeta WHERE post_id IN (92089) ORDER BY … WebFeb 25, 2024 · Sorting for group 线程做一个分组。 Sorting for order 线程做ORDER BY排序。 Sorting index 线程排序索引，更高效的访问MyISAM表的优化操作。 Sorting result 对于SELECT语句，这是Creating sort index类似,但不用临时表。 statistics 服务器计算统计数据，以制定一个查询执行计划。 Web通过一个 create sort index 案例彻底弄懂 mysql inndb 索引的优化方法. SELECT `id`, `title` FROM `th_content` WHERE `audit_time` < 1541984478 AND `status` = 'ONLINE' … pentax download software

mysql下监测数据库语句creating sort index时间过长的问题

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Creating sort index时间过长

mysql process list: "Creating sort index" or "sending data" …

WebJun 6, 2024 · 以下内容是CSDN社区关于每次都在creating sort index 这个步骤卡死 怎么办相关内容，如果想了解更多关于MySQL社区其他内容，请访问CSDN社区。 ... 行连上数 … WebFeb 28, 2024 · The thread is doing a sort to satisfy a GROUP BY. Sorting for order The thread is doing a sort to satisfy a ORDER BY. Sorting index The thread is sorting index pages for more efficient access during a MyISAM table optimization operation. Sorting result For a SELECT statement, this is similar to Creating sort index, but for …

Creating sort index时间过长

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WebThe SORT function will return an array, which will spill if it's the final result of a formula. This means that Excel will dynamically create the appropriate sized array range when you press ENTER.If your supporting data is in an Excel Table, then the array will automatically resize as you add or remove data from your array range if you're using Structured References. WebSort object by labels (along an axis). Returns a new DataFrame sorted by label if inplace argument is False, otherwise updates the original DataFrame and returns None. The axis along which to sort. The value 0 identifies the rows, and 1 identifies the columns. If not None, sort on values in specified index level (s).

WebThe creating sort index state appears when a query with an ORDER BY or GROUP BY clause can't use an existing index to perform the operation. In this case, MySQL needs … 这通常是因为在大量数据的表中进行 order by 操作导致的，在这样的情况下，order by 操作的性能可能会低到令人无法想象。 See more

WebAug 16, 2024 · 在使用order by关键字的时候，如果待排序的内容不能由所使用的索引直接完成排序的话，那么MySQL有可能就要进行“文件排序” 【其实并不是从文件中查找排序，不要误解】。. 看下索引情况. 最左侧的索引 rental_date 使用范围查询 来验证下. 结论： 如果查询 … WebMay 31, 2024 · Each row in the EXPLAIN's output having NULL in the 'key' column should be investigated. Those row marked as (derivedN) aren't the culprits but rather the victims. In your case flyer_items table need the indexes: (id), (flyer_id), (id, flyer_id) and (flyer_id, id).I can't predict which one of the last two will be choosed by optimizer. Then derived tables …

WebOct 28, 2014 · This started happening after an upgrade from 5.5, and it takes about 5-10 seconds to complete. thuser_id_start_time_end_time is a compound index on user_id, start_time and end_time. If if explain the query, I get : Using index condition; Using filesort in the extra column and a reasonable amount of rows (~500).

WebOct 3, 2024 · I would try to give those 76 or 215 id's using a query from the database, in stead of a list of numbers. @Luuk Those ids come from POST (ie from form). Pretty complex form, if it produces 76 id's + 215 other id's. I think that problem needs more attention than the performance of this query. pentax ehy-110sWebJun 23, 2024 · 前言最近系统(基于SpringCloud+K8s)上线，运维团队早上8点左右在群里反馈，系统登录无反应！我的第一反应是Mysql数据库扛不住了。排查问题也是一波三折，有 … pentax ed-3490tkWebJul 11, 2024 · Very slow "creating sort index". on one of my InnoDB tables some queries are terribly slow; specifically the process hangs in 'creating sort index' for tens of minutes. The table stores values, indexed by time and various other identifiers, MySQL version is 5.7.22-0ubuntu0.16.04.1. The table is partitioned by range over the `unixtime` column ... pentax dslr red filter for black and whiteWebFeb 13, 2024 · 有一个主表left join 同一个小表两次分页语句，因为order by 导致执行时做排序，从执行计划中Using filesort ，以及profile中creating sort index 耗时可以看出。从trace文件可以看出filesort的计算："join_execution": { &nbsITPUB博客每天千篇余篇博文新资讯，40多万活跃博主，为IT技术人提供全面的IT资讯和交流互动的IT ... pentax electronics \\u0026 photography film camerasWebFeb 28, 2024 · One of the query we are doing on this items_view that is stuck in making sorting index. SELECT `id`, `code`, `name`, `large_image_url`, `thumbnail_url`, `medium_thumbnail_url`, `symbol`, `ip_name`, `owner_id`, `auction_id`, `is_auction`, `highest_bid_amount`, `auction_expire_at`, `auction_start_amount`, `enable_sale`, … pentax digital slr camera body onlyWebOct 27, 2014 · This started happening after an upgrade from 5.5, and it takes about 5-10 seconds to complete. thuser_id_start_time_end_time is a compound index on user_id, … toddler 17 month milestonesWebJun 13, 2024 · Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier. Pandas dataframe.sort_index() function sorts objects by labels along the given axis. Basically the sorting algorithm is applied on … toddler 2 piece footed pajamas