On 10/09/2020 21:56, Keith Edmunds wrote: > Using swap is not a bad thing in itself (quite the opposite in many cases). > > The actual process of swapping is expensive, though, and you want to > minimise that. > > One way to see whether you have a lot of swapping going on is to run > "vmstat 1" (you don't need to be root). That will produce a new line of > data every second until you stop it (^C). in the middle are two columns > under the label "swap", one sub-labelled "si" and the other "so". They are > respectively "swap in" (ie, read from disk back into memory) and "swap > out" (the other way). If those columns hold mostly zeros, you don't have a > swap problem. > > How does it look on your system?
Here's a sample: procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 3 0 2267312 738416 421568 7325016 0 0 1024 240 7548 10847 18 3 78 1 0 3 0 2267312 739164 421568 7325036 0 0 0 0 6874 10642 19 3 79 0 0 2 0 2267312 739308 421568 7325036 0 0 0 0 6548 10399 18 2 80 0 0 I agree about swapping, but in my case, using 20GB of RAM with almost nothing open (and no change when I close things) is not good behaviour when my use at cold boot is like 2GB. Please note, this is not cache, as reported by "free" and in /proc/meminfo earlier. Hamish
signature.asc
Description: OpenPGP digital signature
-- Next meeting: Online, Jitsi, Tuesday, 2020-10-06 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
