In the context of technology, “flush” primarily refers to the process of clearing out or cleaning data from a buffer or cache. This action ensures that any data waiting to be written is securely transferred to its appropriate destination, such as storage or memory. Additionally, flushing can help maintain system performance and prevent data inconsistencies or errors.


The phonetic spelling of the keyword “FLUSH” is: /flʌʃ/

Key Takeaways

  1. FLUSH is a command in database management systems that helps clear or free up memory buffers, ensuring that the system performs optimally and maintains data integrity.
  2. There are various types of FLUSH commands, such as FLUSH TABLES, FLUSH LOGS, and FLUSH PRIVILEGES, which serve different purposes like releasing table locks, closing log files, and reloading user privileges from the grant table.
  3. Using FLUSH commands judiciously can aid timely resource allocation, reduce resource contention, and ensure up-to-date and accurate data retrieval across database operations.


The term ‘flush’ is important in technology because it ensures efficient functioning and data synchronization within various systems, particularly in data storage and communication processes.

Often used in the context of caches, buffers, and I/O operations, flushing refers to the act of clearing out temporary memory or intermediate storage locations to push the data to its intended destination, guaranteeing data consistency and integrity.

By cleaning out these temporary holding areas, the system is able to maintain optimal performance levels and avoid the possibility of data corruption or loss, making the flushing process a crucial aspect of reliable computing and data management.


In the realm of technology, the term “flush” is often associated with data transfers and the management of memory buffers. The purpose of flush is to ensure that any data temporarily stored in a buffer or cache is transferred to its final destination promptly, guaranteeing that all relevant data is effectively written, and no data gets lost or corrupted in the process. This is done to maintain data consistency, boost performance, and improve the stability of a system, application, or hardware device.

Buffers are used as an intermediary location for faster data transmission, as they enable data to be written and read at different speeds in different parts of a system. Due to this speed discrepancy, it is essential to periodically flush these buffers to ensure data is saved correctly. Flushing may be triggered manually or automatically, depending on the programming logic and specific context.

In database systems, for example, flush might be employed to store modified data from memory to disk storage. Meanwhile, in file operations, flushing can be utilized to move any remaining data from a buffer to its destination after the file is closed. Overall, the act of flushing plays a crucial role in enhancing performance and safeguarding data integrity.

Examples of FLUSH

FLUSH technology is not a specific technology or system; it is a term used in various technological fields often related to clearing or emptying data. Here are three real-world examples where the term “flush” is used in technology:

Cache Flush: In computing, a cache flush occurs when the contents of a cache memory are emptied or cleared. This could be done to free up memory space or to ensure that the most recent data is retrieved from the primary storage device. An example of real-world cache flush is when a web developer clears their browser cache to see freshly-updated website content without any unwanted data from previous cached versions.

Buffer Flush: In computer programming, particularly when working with input and output operations, a buffer flush refers to the process of emptying or writing data from a temporary memory buffer to its intended storage device or location. This ensures that all the data in the buffer is processed, and the buffer is clean for further usage. An example of buffer flush is when writing data to a file; after a certain amount of data is accumulated, it has to be flushed so the new data can be added.

Toilet Flush: In the context of sanitary technology, the flush mechanism in a toilet is a real-world example of a flushing system. This technology uses water pressure or, in some cases, air pressure to flush away waste from the toilet bowl and move it to the sewage system. The flush mechanism ensures cleanliness and hygiene in bathroom facilities.


1. What does “flush” mean?

Flush refers to the process of clearing or cleaning something by forcing water, air, or another fluid through it. In the context of plumbing, it often involves clearing out waste materials from pipes and fixtures.

2. How do I flush a toilet properly?

To flush a toilet properly, push or pull the flush handle or button until the water in the bowl has completely drained and refilled with clean water. The flushing mechanism may vary depending on the type of toilet being used.

3. How often should I flush my water heater?

It is recommended to flush your water heater at least once a year to remove sediment buildup and improve its efficiency. However, if you live in an area with hard water, you may need to flush it more frequently. Always consult the manufacturer’s guidelines.

4. Why is it important to flush cooling systems in vehicles?

Flushing the cooling system in a vehicle is crucial to remove rust, sediment, and other contaminants that can lead to engine overheating, corrosion, or damage. Regular maintenance, including flushing the system, helps to ensure optimal performance and extend the life of your engine.

5. Can I flush disposable wipes down the toilet?

Although some disposable wipes are marketed as flushable, it’s best to avoid flushing them down the toilet. Flushable wipes can create blockages in pipes and contribute to “fatbergs” — large clumps of grease, wipes, and other debris that clog sewer systems. Dispose of wipes in the trash instead.

Related Technology Terms

  • Cache clearing
  • Buffer emptying
  • Memory wipe
  • Data purging
  • IO stream flushing

Sources for More Information


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