How Do You Handle The Linux Cron Swap File?
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Over the past few days, some of our users have reported that they have encountered the Linux cron swap file.
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Similar to: yes, bad. You are actually using it to check if there is a lot of available memory before you turn off the compromise. See https://askubuntu.com/a/90399/15811 for the best current version.
Also: are you no doubt there? Distributing a swap does not mean that the swap is already in use. Command vmstat , columns si In) (swap as well as so (swap) If user stays at 0 you have Other Problem: My exchange is underused and you can’t create it because you think it’s not empty, but nothing is empty.
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answered Nov 6 ’17 at 14:55
268k
I would say this is a bad idea. If you suspect that you have free memory, and a dynamic process does not enter RAM after replacement, try not to have as much free memory as you think, otherwise a particular process is not as active, let that person think so.
If the active agent is still for sale, you will need to rebuild it, which is likely to put a strain on memory. If this is not an active process, what exactly is the problem?
satisfied Nov 6 ’17 to 14:54
178k
The kernel is opened by copying (without moving) the data for too long before physical memory is nearly full, because the process may requireThis means that all memory is immediately reused without having to rewrite it to disk.
This usually takes up space, mainly for pages that have not been viewed for a long time. This is a good indicator that they are unlikely to be called automatically anytime soon.
Explicitly avoiding copies does not offer any benefit since the data is still in RAM, but this can be fast if a process wants to allocate a lot of memory and swapping is required.
Will’s core also always maintains swap memory if the allocated memory is more than 50% full. These numbers will not be zero at all if you have enough internal memory.
answered Nov 6 ’17 at 15:40
2,991
This is almost certainly a bad idea. If this process made sense, this is how the Linux kernel forwould put it to work. I really don’t think there is a reason to tweak more than a few tuning parameters, as such a simple cloaking scenario is probably not much smarter than some kernel developers’ algorithms.
- Processes stored on the hard drive are not used anyway. Why can they be reinserted into RAM?
- RAM is low. Use them for sharing and you can drag and drop them into RAM. Then your system will replace them accordingly as soon as possible.
- First, if you have too little RAM to run all programs quickly, your system will slow down. Swap helps you manage a lot of programs, but it doesn’t change the rate of your underutilization, which can be replaced. No exchange can kill a seldom used or send a store exception to an available used one.
- Secondly, replacing is considered a good thing, as is replacing things, because you have free RAM at the prices of programs you are currently not familiar with at all.
Xalthough too many programs do not exhaust memory, some parameters may allocate memory depending on how much memory is currently free (your phone may be using more cache memory and you can run faster), for which the kernel can use a free computer RAM caching and similar optimizations. If a single forced swap clears yours, the kernel will clear its search cache and, for example, take longer to launch an updated Firefox instance if Firefox is still in the hard disk cache.
If you want to record kernel behavior, take a look at the swappiness parameter.
- Optimizing Linux for Slow Computers
- https://lonesysadmin.net/2013/12/22/better-linux-disk-caching-performance-vm-dirty_ratio/
If you really want to trade from scratch, you can trade consistently higher. I don’t know why it is only turned on for one hour and then emptying it has advantages over not replacing it.
answered Nov 6, 2017 . at 15:34
571
You can achieve the same results by telling the kernel to release the cache:
echo 3> / proc / sys / vm / drop_caches
This way you avoid short-term memory outages and leave it up to the kernel to determine what is needed and what can possibly be thrown away.
answered Nov 7 17 at 13:24
300
Contrary to popular belief, SWAP is inherently good.
What slows down your system as a whole is some kind of core of activity that moves data from RAM to SWAP and therefore flips it over But in RAM, more precisely swappiness .
The system does this automatically because this element is configured with swappiness .
As a result, memory is often moved to the swap partition of the hard disk by inactive processes.
I myself have worked for many years with a real machine that did not have a lot of RAM and used memory swap in most cases. Even so, the machine worked fine until people started moving memory to RAM, possibly trying to close an open application. Then get to work if you want to increase the load.
- So, if you keep flushing the SWAP memory, the load on your amazing machine will increase significantly.
- Running applications that have memory in the SWAP section may become corrupted during execution.
Instead, I suggest you take a close look at which application is using your memory, go to the command line with the main application htop , and decide to close the application. gnome-system-monitor can also provide a good overview on the device process tab.
ifyou have large applications that use a lot of RAM. Don’t do them all at the same time.
answered 3 years ago Nov 17 at 16:37
리눅스 스왑 파일 크론
File Di Scambio Linux Cron
Fichier D Echange Linux Cron
Linux Wisselbestand Cron
Linux Swap Fil Cron
Fajl Podkachki Linux Cron
Linux Auslagerungsdatei Cron
Arquivo De Troca Do Linux Cron
Archivo De Intercambio De Linux Cron
Cron Pliku Wymiany Linux
