Difference between "swap free" in top and "available" in swa

[630111]

I run top with no command line options and I get

Memory: 2048M real, 31M free, 446M swap in use, 558M swap free

I run swap -s and I get

total: 1124232k bytes allocated + 55296k reserved = 1179528k used, 1440296k available

Why the difference in the "in use"/"used" and "free/available" in the swap statistics?

Thanks!
630111

 

[spavlov]

Hi,

The answer is the following:
BYTES ALLOCATED-The total amount of swap in 1024-byte blocs that is currently allocated
RESERVED-The total amount of swap space in 1024-byte blocs not currently allocated, but claimed by memory for possible future use
USED=ALLOCATED+RESERVED
AVAILABLE-the swap currently available for future reservation and allocation

Cheers,
Slava SCSA

 

[630111]

Thanks for your answer, spavlov. However, I am still wondering why in top is says 446mb in use and swap -s says I have 1179528k used. Shouldn't the numbers be the same? Top says I have 558mb swap free and swap -s says I have 1440296k available - shouldn't these be the same as well?

Thanks again!

 

[sworthin]

most of the discrepancy is that swap reports in 512 byte blocks. See

http://www.sun.com/sun-on-net/itworld/UIR980701perf.html

for more. hth