Tag:fragment

  • Redis memory fragmentation

    Time:2021-7-12

    catalogue 1、 What is memory fragmentation 2、 How to judge whether there are memory fragments 3、 How is memory fragmentation formed 3.1 jemalloc allocation mechanism leads to 3.2 modification and deletion of data results in 4、 How to clean up memory fragments 4.1 restart 4.2 redis memory fragmentation automatic cleaning mechanism 5、 Analogy with reality […]

  • How to deal with the problem of MySQL | space fragmentation

    Time:2021-6-29

    1、 Sharing of serious cases of space fragmentation 1.1 problem description The disk space of the instance has an obvious upward trend in recent one month, mainly due to the large storage of individual log tables and the space fragmentation of some tables. 1.2 treatment process 1. Through daily inspection and monitoring, it is found […]

  • Linux kernel vs memory fragmentation (Part 2)

    Time:2021-6-24

    fromLinux kernel vs memory fragmentationWe can see that grouping according to the migration type only delays the memory fragmentation, but does not fundamentally solve it. Therefore, as time goes on, when there are too many memory fragmentation to meet the continuous physical memory requirements, it will cause performance problems. Therefore, it is not enough to […]

  • Huawei cloud database gaussdb (for Cassandra) unveils phase 2: troubleshooting experience of abnormal memory growth

    Time:2021-6-13

    Abstract:The abnormal growth of memory is a fatal problem for the program, because it may trigger oom, process abnormal downtime, business interruption and other results, so the reasonable planning and control of memory is particularly important. This article is shared from Huawei cloud community《Huawei cloud database gaussdb (for Cassandra) unveils phase 2: troubleshooting experience of […]

  • A memory leak analysis of a. Net foreign trade web station

    Time:2021-6-12

    1: Background 1. Tell a story Last Thursday, a friend of mine, Jia Wx, inquired that there was a certain degree of memory leakage in his program, and it could not be recycled by GC. Finally, the machine ran out of memory, which was very embarrassing. After communication, this friend’s ability is still very good. […]

  • CSS3 custom scroll bar style: WebKit scroll bar

    Time:2021-5-8

    The default scroll bar style in windows is very ugly, and there are many places in the project where the scroll bar will be displayed, so I turn back to CSS3, and I really can realize the custom scroll bar style without plug-ins, which is just what I want The code is as follows: /The […]

  • Puppeter series step pit log – 1 – batch screenshot turns white

    Time:2021-4-27

    In ordinary times, the most common use of puppeter is screenshots (daily batch automatic screenshots). My goal is the homepage of some stores in xbao. This time, the problem is that in some wireless terminals, the merchant’s page is very long, even more than 60000-100000 pixels. Often appear white screen or incomplete phenomenon. The first […]

  • SQL Server index defragmentation

    Time:2021-4-10

    There are four methods of index defragmentation 1) Delete index and rebuild 2) Using drop_ The existing statement rebuilds the index 3) Use the alter index rebuild statement to rebuild the index 4) Reorganizing indexes using alter index reorganize –1. View fragments SELECT DB_NAME() AS DatbaseName , SCHEMA_NAME(o.Schema_ID) AS SchemaName , OBJECT_NAME(s.[object_id]) AS TableName , […]

  • Android serial 8 – add fragments dynamically

    Time:2021-3-31

    1、 Add fragments dynamically   ​   ​ Let’s modify a layout page first, and then add the page to the main page, as shown below ​ ​ ​   After we make the layout, we start editing the main activity   package com.example.fragmenttest; ​ import android.app.Activity; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.os.Bundle; import android.view.Menu; […]

  • Fragmented learning java outline

    Time:2021-3-18

    A series of articles: Fragmented learning java outline Fragmented learning Java (1) — the first Java program Fragmented learning Java (2) — Java annotation Fragmented learning Java (3) — Java defines variables Fragmented learning Java (4) — Java data types Fragmented learning Java (5) — calculating cylinder volume with Java Fragmented learning Java (6) — […]

  • Fragmented learning Java (1) — the first Java program

    Time:2021-3-17

    A series of articles: Fragmented learning java outline Fragmented learning Java (1) — the first Java program Fragmented learning Java (2) — Java annotation Fragmented learning Java (3) — Java defines variables Fragmented learning Java (4) — Java data types Fragmented learning Java (5) — calculating cylinder volume with Java Fragmented learning Java (6) — […]

  • Fragmented learning Java (2) — Java annotation

    Time:2021-3-16

    A series of articles: Fragmented learning java outline Fragmented learning Java (1) — the first Java program Fragmented learning Java (2) — Java annotation Fragmented learning Java (3) — Java defines variables Fragmented learning Java (4) — Java data types Fragmented learning Java (5) — calculating cylinder volume with Java Fragmented learning Java (6) — […]