How can I find out which tab or which website (in Google Chrome) uses a lot of memory?

Sometimes a website in Google Chrome may consume a lot of memory after a day or two (and the hard disk space objected to by MacBook is running low).

It could be a mistake if I close a certain tab and wait 2-3 minutes, then the hard drive suddenly recovers 2 GB.

Is there any way to find out which website uses so much storage space other than errors and mistakes?

(Some web pages don't appear to be harmful, but they could be analytics or the ad system where the code has a lot of memory leaks.)

Applications – Define memory limits per application

Is there a way to define how much space an app can use?

I'm tired of uninstalling apps, deleting app data, and deleting files to see how these "misused" apps are swallowed up in just a few hours!

The worst thing is that I have real needs with some of these apps.
Take Outlook, for example, it wastes space on caching old emails that I'm not going to read, and there are no settings to control this behavior. I use it with my personal and business accounts. When I clean the data, the authentication steps for each account are repeated every day. This is just one of those problematic apps.

Repeatedly using the "delete things" method just looks stupid, a bad choice for process design …

And I don't care about the loss of functionality, they have to deal with every room that I think is worthy. =]

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WhatsApp chat recovery from msgstore.db.crypt12 file in internal memory

I tried to set up WhatsApp for my friend's phone number and restore "msgstore.db.crypt12" from the phone's internal storage and it worked. However, the same step doesn't work for my phone number. With my phone number, WhatsApp is always looking for a backup in Google Drive from which it can be restored, even if I deleted the Google account on the phone and deactivated the internet connection.

Internal memory – Why do A2 MicroSD cards have a lower random speed than A1?

Why do A2 MicroSD cards have a lower random write speed?

As I know, there are no benchmarks IS OR EXACT how This differs from device to device and many other aspects to get another idea I googled what I can compare with UHS II and the speed of internal storage and set up a benchmark for microSD cards (but his camera can't find a resource for pre-tested Android phone before the benchmark).

To Select UHS I MicroSd SDXC above Memory cards for manufacturing Adoptable memory / swap / Link2SD (Linking the apps) However, internal and external storage are not secure and therefore only result in a few queries

I provide the table and the value of the benchmark I created for a 128 GB UHS-I card below, and I will ask some questions later

Benchmark comparison of the UHS I MicroSd card
Benchmark comparison of the UHS I MicroSd card

  • Values ​​marked in yellow are low compared to other values
  • Values ​​marked in orange are the lowest values ​​compared to others

I want to find cards from above that match mine Internal storage speed of the phone and Speed ​​of UHS II cards and give good performance. I want to use my external microSd card for Storage for customizable / interchangeable / Link2SD linking apps , Therefore, I find that the speed of the application is the main preference for the speed of the card

Now my questions are:

  1. Which of 4 cards with the result is best suited for the performance customizable / swap / Link2Sd
  2. Why MicroSDXC UHSI U30 A2 class have benchmark values Slower speed when writing QD1 and QD32 randomly
  3. Is it ok for Android MicroSDXC UHSI U30 A2 class benchmark values Have less speed in randomly writing QD1 and QD32 It will work fine, as many websites have noted A2's random write speed is slower than A1's for Android

  4. Through these bechmarks, what is your advice A1 good or A2 card which is better for Android.

  5. A2 have wide Good sequential read and write speeds as A1 cards, but they are Bad IN QD1 QD32 and IOPS output

I finish studying by benchmark and kindly suggest which memory card is good and which value is better Adoptable / Swap / Link2SD

Wait for your valuable expert advice at the earliest. Thank you in advance for your valuable advice and your time to answer and answer

mariadb – How can I reduce the memory usage of a tiny MEMORY table in MySQL?

After running the following queries:

CREATE TABLE mem_test (i int NOT NULL AUTO_INCREMENT PRIMARY KEY) ENGINE=MEMORY;
INSERT INTO mem_test () VALUES ();
SELECT table_rows,avg_row_length,data_length,index_length FROM INFORMATION_SCHEMA.TABLES WHERE table_name='mem_test';

I get this in MySQL 5.7.28:

+------------+----------------+-------------+--------------+
| table_rows | avg_row_length | data_length | index_length |
+------------+----------------+-------------+--------------+
|          1 |              8 |      126992 |       126984 |
+------------+----------------+-------------+--------------+

and that in MariaDB 10.4.10:

+------------+----------------+-------------+--------------+
| table_rows | avg_row_length | data_length | index_length |
+------------+----------------+-------------+--------------+
|          1 |              5 |     1677712 |      2093064 |
+------------+----------------+-------------+--------------+

My table never gets anywhere near the size of these pre-allocated buffers. So how can I make MySQL and MariaDB waste less RAM?

nosql – System design for filtering / sorting objects whose properties are stored in a distributed memory

Imagine that we have an item warehouse O (May not matter in SQL, NoSQL) where the object contains a property P_1 to P_n, Some of these properties are stored in memory S1some in storage S2In general, imagine that the full definition of a single object is only possible by calling a type of lookup or join across many memories. You can also imagine that the object is distributed horizontally across different logical databases and that each database does not know any other databases.

Now we want to define a way to filter and sort these objects. However, the ability to filter and sort the objects depends on properties that span multiple databases. At first glance, this means that if we want to do some sorting or filtering, we have to retrieve the entire database and merge the properties on the caller side, which can quickly become expensive for non-trivially large databases.

How can we do this efficiently?

Some options come to mind:

  1. Store columns used for filtering / sorting in a memory. In other words, make sure that the properties used for filtering / sorting hold together so that we can do the filtering / sorting on the database server. However, this is inflexible because if we have to change the filtering / sorting algorithm we may have to change the storage scheme. Admittedly not too painful in the NoSQL database, but still a change in the implicit scheme.
  2. Limit filter / sort algorithms only to properties that are held together in a database. This is effectively a variant of # 1, but the burden of the inflexible on the caller side.
  3. Have a memory specifically for storing a filtered + sorted list of objects. It feels a bit stupid and is totally inefficient, especially when the filtering / sorting algorithm is very general.

When I think about this issue, it also occurs to me that it is a problem similar to how Facebook can give any user a custom news feed. How is the newsfeed sorted efficiently when the relevance factor of each newsfeed element is specific to the user?

Linux – Need Help? – I uninstalled Intel Optane Memory. – The message says that my computer no longer starts after the restart

I uninstalled Intel Optane Memory because I was convinced that this would affect the creation of a dual boot system with Linux on a Lenovo Ideapad 330S 151KB (based on a guide). There was a warning about possible data loss and a checkbox to read about it. I checked the box and selected next. The text file says that my system cannot boot after a restart. The uninstallation of the application continued with the opening of the text file. (!!!)

I created a restore point just before I started this uninstallation. The uninstallation window is still waiting for the restart. I made two backups of all my data (not the operating system). I really don't want to have to reinstall Windows and Office and all licenses etc. etc. No CD / USB with the operating system was supplied on the computer. I realize that I can download Windows – I need to research how to do it. This is a one year old computer that came with Windows 10 (not Office). (I have Ubuntu on an external SSD, and it has grub on the SSD, not on my internal hard drive. So that should still work. I actually did the installation with a physically separate internal hard drive.)

Can I undo that? Can I restore to this restore point now?

Any help is greatly appreciated.

The warning text document – you must show this FIRST! (This is incredible – they warned about data loss, but not a non-bootable system):

WARNING!!!!!!!!!!!!WARNING!!!!!!!!!!WARNING!!!!!!!WARNING!!!!

WARNING: Removing the driver files may result in the loss of 
data on any RAID volumes currently used by the system. Removing 
the Intel Rapid Storage Technology driver from the boot drive or 
bootable RAID volume will remove access to the drive and will 
require reinstallation of the operating system. To preserve data
integrity, backup all data before proceeding.

Proceed ONLY if you absolutely have all your required data
backed up from all single drives and RAID volumes present in the
system and ONLY if you have no need to access these drives or 
volumes after this operation is completed!!! If this is not the
case, please cancel and exit this Uninstall application.

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Android large empty memory marked as full (new phone)

So I bought this brand new X27 Plus with 64GB storage. The phone shows 63 GB of free space while checking, but I keep getting the error message that your memory is full.

When I connect it to my computer as an MTP, the 64 GB hard drive is shown as used space as long as it is empty. If I connect it as USB storage, it is divided into a full 1.25Go G: disc and an unreachable H: disc. I tried to access it with "DIR / A h: -s" and got "the device is not ready".

Any ideas on what's going on and how to get it going?

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