C Windows Prefetch Readyboot Readyboot Etl
C Windows Prefetch Readyboot Readyboot Etl: What You Need to Know
If you have ever wondered what the file C Windows Prefetch Readyboot Readyboot Etl is and why it is important for your system performance, this article will explain everything you need to know. This file is part of the ReadyBoot feature, which is a variant of the ReadyBoost technology that uses flash memory to speed up disk access. ReadyBoot uses data from previous boot sessions to create a plan for a boot-time memory cache, which can improve the boot time of your system by preloading files into RAM before they are needed. In this article, we will cover how ReadyBoot works, how to manage and troubleshoot it, and how to optimize it for your system.
C Windows Prefetch Readyboot Readyboot Etl
How ReadyBoot Works
ReadyBoot is a feature that is enabled by default on systems with more than 700MB of RAM and a hard disk drive (HDD) or a solid state drive (SSD). It works by collecting data from five previous boot sessions and analyzing them to create a cache plan for the next boot. The cache plan consists of a list of files that are likely to be accessed during the boot process, such as drivers, services, and applications. ReadyBoot then stores these files in a file called C Windows Prefetch Readyboot Readyboot Etl, which is located in the Prefetch folder under the Windows directory.
When you start your system, ReadyBoot reads the cache plan from the file and loads the files into RAM before they are requested by the system. This reduces the disk access time and improves the boot performance. All memory used by ReadyBoot is automatically released 90 seconds after booting up, or immediately if another service needs it, so it does not have negative performance consequences.
How to Manage and Troubleshoot ReadyBoot
ReadyBoot is designed to work automatically and does not require any user intervention. However, there are some situations where you may want to manage or troubleshoot it. For example, you may want to disable it if you have a very fast SSD that does not benefit from caching, or if you experience any problems with booting up. You may also want to clear or reset the cache plan if it becomes corrupted or outdated.
To disable ReadyBoot, you can use the following steps:
Open the Start menu and type "services.msc" in the search box.
Press Enter or click on the Services app to open it.
Find the service named "Superfetch" and double-click on it.
In the Properties window, click on the Stop button to stop the service.
Change the Startup type to Disabled and click on OK.
Restart your system for the changes to take effect.
To enable ReadyBoot again, you can follow the same steps but change the Startup type to Automatic.
To clear or reset the cache plan, you can use the following steps:
Open File Explorer and navigate to C:\Windows\Prefetch.
Find the file named "ReadyBoot.etl" and delete it.
Restart your system for the changes to take effect.
Note that deleting the file will cause ReadyBoot to create a new cache plan from scratch, which may take several boot sessions to optimize.
How to Optimize ReadyBoot
ReadyBoot is a smart feature that adapts to your system usage and tries to optimize the boot performance. However, there are some factors that may affect its efficiency and accuracy. For example, if you install or uninstall many programs, change your hardware configuration, or use different boot options, your cache plan may become outdated or inaccurate. In this case, you may want to optimize ReadyBoot by following these tips:
Avoid using multiple boot options, such as Safe Mode or Debug Mode, as they may confuse ReadyBoot and cause it to load unnecessary files.
Avoid installing or uninstalling many programs at once, as they may change the files that are needed during booting.
Avoid changing your hardware configuration frequently, such as adding or removing devices or drives, as they may affect the disk access time and order.
Avoid deleting or moving files that are part of the cache plan, such as drivers or services, as they may cause errors or delays during booting.
Avoid using disk defragmentation tools or cleaners that may alter or delete the cache plan file.
If you follow these tips, you can ensure that ReadyBoot works efficiently and accurately for your system and improves your boot performance.
Conclusion
C Windows Prefetch Readyboot Readyboot Etl is a file that is used by Windows to store data from previous boot sessions and optimize the boot time of your system. It is part of the ReadyBoot feature, which is a variant of the ReadyBoost technology that uses flash memory to speed up disk access. ReadyBoot works by creating a cache plan for a boot-time memory cache, which can improve the boot performance by preloading files into RAM before they are needed. You can manage and troubleshoot ReadyBoot by using the Services app or by deleting the cache plan file. You can also optimize ReadyBoot by avoiding actions that may affect its efficiency and accuracy. By understanding how ReadyBoot works and how to use it properly, you can enjoy faster and smoother booting on your system.
How to Check the Status of ReadyBoot
If you want to check the status of ReadyBoot and see how it affects your boot performance, you can use the Event Viewer tool to view the ReadyBoot events. To do this, you can use the following steps:
Open the Start menu and type "eventvwr.msc" in the search box.
Press Enter or click on the Event Viewer app to open it.
In the left pane, expand Applications and Services Logs, Microsoft, Windows, and Kernel-Boot.
Click on Operational to view the ReadyBoot events.
In the right pane, you can see the details of each event, such as the date and time, the event ID, the level, and the message.
The most important events to look for are event ID 100 (ReadyBoot started), event ID 101 (ReadyBoot stopped), and event ID 103 (ReadyBoot cache plan created). These events will tell you when ReadyBoot was active, how long it lasted, and how many files were cached. You can also see the boot time improvement percentage in the message of event ID 103.
For example, a typical message of event ID 103 may look like this:
A cache plan was created for volume C: with size 20 MB. The cache contains 123 files with total size 18 MB. The boot time improvement is estimated at 15%.
This means that ReadyBoot created a cache plan for the C: drive with a maximum size of 20 MB, which contained 123 files with a total size of 18 MB. The estimated boot time improvement was 15%, which means that ReadyBoot reduced the boot time by 15% compared to a boot without caching.
You can use this information to evaluate the effectiveness of ReadyBoot and see if it is worth keeping or disabling.
How to Change the Size of ReadyBoot Cache
By default, ReadyBoot sets the maximum size of the cache plan file to 20 MB, which is enough for most systems. However, if you have a large amount of RAM and a slow HDD, you may want to increase the size of the cache to store more files and improve the boot performance. Alternatively, if you have a fast SSD and a small amount of RAM, you may want to decrease the size of the cache to save some memory and disk space.
To change the size of ReadyBoot cache, you can use the following steps:
Open the Start menu and type "regedit" in the search box.
Press Enter or click on the Registry Editor app to open it.
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WMI\Autologger\ReadyBoot.
Find the value named "MaxFileSize" and double-click on it.
In the Edit DWORD (32-bit) Value window, change the Base to Decimal and enter the desired size in bytes. For example, if you want to set the size to 40 MB, enter 40000000.
Click on OK and close the Registry Editor.
Restart your system for the changes to take effect.
Note that changing the size of ReadyBoot cache may affect its performance and accuracy. You should experiment with different values and see what works best for your system.
How to Monitor ReadyBoot Performance
If you want to monitor ReadyBoot performance and see how it affects your boot time, you can use the Performance Monitor tool to view the ReadyBoot counters. To do this, you can use the following steps:
Open the Start menu and type "perfmon" in the search box.
Press Enter or click on the Performance Monitor app to open it.
In the left pane, expand Data Collector Sets and click on Startup Event Trace Sessions.
In the right pane, right-click on ReadyBoot and select Start from the context menu.
In the left pane, expand Reports, User Defined, Startup Event Trace Sessions, and click on ReadyBoot.
In the right pane, you can see a report with various graphs and counters related to ReadyBoot performance.
The most important counters to look for are Boot Time (ms), Boot Prefetch Hit Rate (%), Boot Prefetch Bytes Read (MB), Boot Prefetch Bytes Saved (MB), and Boot Prefetch Improvement (%). These counters will tell you how long your system took to boot, how many files were cached and read by ReadyBoot, how much disk access time was saved by ReadyBoot, and how much boot time was improved by ReadyBoot. You can use this information to evaluate the effectiveness of ReadyBoot and see if it is worth keeping or disabling.
How to Enable or Disable ReadyBoot on Windows 10
On Windows 10, ReadyBoot is enabled by default on systems with more than 700MB of RAM and a HDD or a SSD. However, you may want to enable or disable it manually depending on your system configuration and preference. To do this, you can use the following steps:
Open the Start menu and type "cmd" in the search box.
Right-click on Command Prompt and select Run as administrator from the context menu.
In the Command Prompt window, type the following command to enable ReadyBoot:
sc config sysmain start=auto
Press Enter and wait for the confirmation message.
Type the following command to disable ReadyBoot:
sc config sysmain start=disabled
Press Enter and wait for the confirmation message.
Close the Command Prompt window and restart your system for the changes to take effect.
Note that enabling or disabling ReadyBoot may affect your boot performance and disk usage. You should experiment with different settings and see what works best for your system.
How to Use ReadyBoot with Multiple Drives
If you have multiple drives on your system, such as a HDD and a SSD, you may wonder how ReadyBoot works with them. The answer is that ReadyBoot only works with the drive that contains your Windows installation, which is usually the C: drive. It does not cache files from other drives, even if they are faster or slower than the C: drive.
This means that if you have a SSD as your C: drive and a HDD as your D: drive, ReadyBoot will only cache files from the SSD and ignore the HDD. This may not make much difference in boot performance, since the SSD is already fast enough. However, if you have a HDD as your C: drive and a SSD as your D: drive, ReadyBoot will only cache files from the HDD and ignore the SSD. This may result in slower boot performance, since the HDD is slower than the SSD.
In this case, you may want to consider moving your Windows installation to the SSD and using the HDD for data storage. This will improve your boot performance and make better use of your SSD speed. You can use tools such as EaseUS Todo Backup or Macrium Reflect to clone your HDD to your SSD and make it bootable.
Conclusion
C Windows Prefetch Readyboot Readyboot Etl is a file that is used by Windows to store data from previous boot sessions and optimize the boot time of your system. It is part of the ReadyBoot feature, which is a variant of the ReadyBoost technology that uses flash memory to speed up disk access. ReadyBoot works by creating a cache plan for a boot-time memory cache, which can improve the boot performance by preloading files into RAM before they are needed. You can manage and troubleshoot ReadyBoot by using the Services app, the Event Viewer tool, or the Registry Editor. You can also optimize ReadyBoot by avoiding actions that may affect its efficiency and accuracy. You can enable or disable ReadyBoot on Windows 10 by using the Command Prompt. You can also use ReadyBoot with multiple drives, but it will only work with the drive that contains your Windows installation. By understanding how ReadyBoot works and how to use it properly, you can enjoy faster and smoother booting on your system. 6c859133af