How to turn off garbage collection in golang

In the Golang programming language, garbage collection is an extremely important function. It avoids the trouble of developers manually managing memory by automatically identifying memory that is no longer used and releasing the space it occupies. However, in some scenarios, turning off garbage collection is a reasonable choice.

This article will discuss how to turn off garbage collection in Golang.

1. Why turn off garbage collection?

1. Performance issues

In some high-performance scenarios, garbage collection may become a performance bottleneck. Since garbage collection requires scanning and processing objects in the entire heap memory, the overhead of garbage collection may be very high in scenarios with large amounts of data and high concurrent access. For these scenarios, turning off garbage collection may be a better choice because it can reduce the consumption of garbage collection and improve program performance.

2. Database Connection Pool

In an application that uses the database connection pool, when the connection in the connection pool is released and recycled into the connection pool, the connection used The memory should also be freed immediately. However, due to different garbage collection algorithms and strategies, there may be some memory release delay issues. If the garbage collection mechanism is used in the connection pool, the connection pool memory may be leaked due to the delay in memory release. In this case, turning off garbage collection may be a better option.

3. Timer

In some scenarios that require high-precision timers, some timers may not be triggered at the expected time due to the existence of garbage collection. . This is because garbage collection may interrupt the running of the program, causing the timer firing time to be delayed. If you turn off garbage collection in this situation, you can ensure that the timer fires at the expected time and improve the stability of the program.

2. How to turn off garbage collection?

In Golang, the way to turn off garbage collection is very simple. Just call the runtime.GC() function to turn off garbage collection.

Sample code:

gcPercent := debug.SetGCPercent(-1)
defer debug.SetGCPercent(gcPercent)

runtime.GC()

// 这里执行你的业务代码

In this code, we first use the debug.SetGCPercent() function to set the garbage collection threshold to -1, which means turning off garbage collection. We then use the runtime.GC() function to force garbage collection. Finally, before executing business code, you must remember to restore the garbage collection threshold to its original value, otherwise it will affect the performance of the system.

It should be noted that turning off garbage collection is not a good idea. In most cases, using garbage collection is a better option because it avoids memory leaks and other related problems. Only in rare cases is it necessary to turn off garbage collection.

3. Conclusion

In the Golang programming language, garbage collection is a very important function. It can automatically identify memory that is no longer in use and release the space it occupies, saving developers the trouble of manually managing memory. However, in some special scenarios, turning off garbage collection may be a better choice to improve program performance and stability. However, in most cases, using garbage collection is a better option because it avoids memory leaks and other related problems.

The above is the detailed content of How to turn off garbage collection in golang. For more information, please follow other related articles on the PHP Chinese website!