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  [learn about MongoDB in five minutes] Change Stream and MongoDB 4.x

  Being fully aware of the data changes in the database is the key point of data synchronization from MongoDB to other data services. Compared with directly querying collection to obtain data changes, streaming monitoring is much more effective and timely. This is a very powerful "responsive programming"

  2022-06-01 06:38:49 Views: 272
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  ORA-01591: lock pending distributed transaction solution

  Http://www.killdb.com/2011/10/11/ora-01591-lock-held-by-in-doubt-distributed-transaction.html reported a merit on the spot.

  2022-06-01 06:38:49 Views: 215
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  [MySQL] selection of the main library of MHA source code (2)

  1. The array maintained by the MHA election master library in the code that MHA selects master, we must explain clearly the context of the four arrays maintained. (1) Alive_slaves array: server is not master, and the slave library is normal.

  2022-06-01 06:38:48 Views: 263
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  Mysql event set up template (can record implementation resume)

  Establish a curriculum vitae record table CREATE TABLE `mysql`.`t _ event_ record y` (`dbname` VARCHAR) NOT NULL DEFAULT', `eventn

  2022-06-01 06:38:48 Views: 257
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  Assm/msmm

  1. How MSSM and ASSM work: MSSM manages free data blocks in each segment as freelistl chains (the free area in the block is 10% higher than the default pctfree), when the amount of data inserted into an empty block reaches the block size 1-pctfree

  2022-06-01 06:38:48 Views: 282
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  Error 3113 trapped in 2PC on transaction xxx. Cleaning up. Error analysis and processing

  one。 Error message Sun Oct 28 00:46:33 2018Error 3113 trapped in 2PC on transaction 644.3.881743. Cleaning up.Err

  2022-06-01 06:38:48 Views: 227
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  A deadlock case in MySQL:Innodb

  First, prepare data and problems RR isolation level CREATE TABLE `ty` (`id` int (11) NOT NULL AUTO_INCREMENT, `a` int (11) DEFAULT NULL

  2022-06-01 06:38:45 Views: 242
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  Measurement of SQL performance-execution plan through v$sql_plan query

  View v$sql_plan is useful when analyzing the performance of SQL statements. Here are a few examples. You can query the execution plan col "Explain Plan" for a100select of SQL that has been run in the library cache through the following script

  2022-06-01 06:38:45 Views: 241
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  Convert oracle.jbo.domain.Date to String

  Public String convertJbodateToString (oracle.jbo.domain.Date domainDate) {SimpleDateFormat formatter

  2022-06-01 06:38:45 Views: 268
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  Considerations when using Amoeba as Proxy for MySQL

  (1). Amoeba does not support transactions. Currently, Amoeba does not support transactions, and any SQL statements related to transactions will be blocked by Amoeba. If you must use a transaction, and all the processing operations within the transaction can be routed to the same MySQL, consider using the stored procedure

  2022-06-01 06:38:45 Views: 299
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  19 commonly used MySQL optimizations

  First, EXPLAIN does MySQL optimization, we should make good use of EXPLAIN to view the SQL execution plan. Here's a simple example of tagging (1, type, 2, 3, 4, 5) the data column and join type that we want to focus on. A good sql statement should at least achieve

  2022-06-01 06:38:38 Views: 266
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  MySQL: the API for simply recording and deleting binary log

  Welcome to my "in-depth understanding of MySQL master-slave principle 32", as follows:! [image.png] (https://upload-images.jianshu.io/upload_images/7398834-0f

  2022-06-01 06:38:38 Views: 216
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  Soul torture using open source MySQL database

  Do you have all the features you want in open source software? What if it is still lacking? L did I choose a technology that can last a long time? How to integrate l with the current system? Can anyone answer your question? How to master the required technology? How to maintain your quality of life? L who happened?

  2022-06-01 06:38:38 Views: 245
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  View BW running status

  BW_pro:cd / sapmnt/BIP/profilehostname:bipadm 5 > jcmon pf=BIP_J01_hostnameJCMon is an internal tool f

  2022-06-01 06:38:37 Views: 210
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  Oracle SQL optimized sql tuning advisor (STA)

  You can often encounter the need to optimize sql, developers directly throw a SQL to DBA optimization, and then what to do? Of course, experienced DBA can start in a variety of directions, and sometimes good optimization results can be achieved by building the right index, but those complex SQL are complex

  2022-06-01 06:38:27 Views: 209
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  How does Topaz Sharpen AI Mac do batch editing in Lightroom Classic?

  Topaz Sharpen AI mac is a powerful and easy-to-use ps image artificial intelligence image sharpening software. Using advanced artificial intelligence technology, you can create clear and sharp images, distinguish real details and noise, and effectively improve the problem of jitter. Topaz Shar

  2022-06-01 06:38:06 Views: 246
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  MySQL Version Tokens

  Releases of MySQL 5.7.8 or later include version tokens, which support the creation and synchronization of server tokens that applications can use to prevent access to incorrect or outdated data. The version token interface has these characteristics:. A version token is the name used as a key or identifier

  2022-06-01 06:38:06 Views: 236
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  Oracle 12c Best practices for collecting statistics from database optimizer (3) | when you do not need to collect statistics

  Original text link http://www.oracle.com/technetwork/database/bi-datawarehousing/twp-bp-for-stats-gather-12c-19673

  2022-06-01 06:38:01 Views: 270
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  Mysql Learning-show table status (get the information of the table) parameter description

  -- get the information of the table mysql > show table status like 'columns_priv'\ Gentleman * 1. Row *

  2022-06-01 06:38:00 Views: 243
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  Image 2 LUT Pro for Mac (image color processing software) v1.5 inactive version

  Want an image color adjustment software? To recommend Image 2 LUT Pro Mac a professional image color adjustment gadget. Image 2 LUT Pro Mac provides some very useful options. In addition to the general intensity of shading, you can also control its alignment to the image

  2022-06-01 06:37:57 Views: 300