Sco Unix 2.1.2 - Need to find how much free memory I have

[douggy]

Hi there,

I need to increase my Oracle Database Buffers.

I need to know how to find out how much free memory there is.

Thanks for you help.

Regards
Mark

 

[stanhubble]

sar -r will give you free real memory and swap memory in 4K pages over the last day. if you dont have sar running in cron then sar -r 5 5 will give you 5 snapshots over 5 second intervals.

p.s.
you may want to recheck the version of sco you are running, I have never heard of 2.1.2 but then i could be wrong.

 

[douggy]

Hi there, Thanks for this. Sar -r 5 5

UNIX_SV CBI1 4.2MP 2.1.2 i386 04/11/01

08:41:29 freemem freeswap
08:41:34 83972 207719
08:41:39 83953 207718
08:41:44 83949 207718
08:41:49 83950 207718
08:41:54 83956 207718
Average 83956 207718

Can you explain what the value is. ie '83972' what does this represent. Please excuse my ignorance.

Regards
Mark

 

[stanhubble]

the number is how many 4k pages are available.
so 4096 x 83972 is 343949312 bytes of memory or approximately 328 MB of ram.

the 207718 number is how much swap space is available.

now you will want to repeat the reading when you are at
peak usage.

good luck.
stan hubble