Re: NetBean become very slow ...
Ahan Hsieh wrote:
Hi, All:
Recently I'm using the Sun NetBean IDE 5.5.1 in Windows, and I found
it'll become very slowing when long time no operation then open it.
In task manager if long time no use then use the NetBean, the memory will
become low;
then open NetBean it increase the memory and diffucult to use the editor.
Fianlly it up to near 150M, then operation is smooth, would you tell me
what happend and how to avoid the memory decreasing ?
It sounds like Windows has decided to steal RAM away from
the idle NetBeans process and move its contents to the paging
disk. When you reactivate the process, there's a page fault
and a disk I/O whenever it tries to access a swapped-out page.
If a lot of memory was paged out, there will be a lot of page-in
I/O's before it's RAM-resident again -- and since a disk access
is on the order of a hundred thousand times slower than a RAM
access, NetBeans runs slowly until it's got its memory back.
I don't know how or whether you can tell Windows that you
don't want it to take memory away from NetBeans, even if NetBeans
is large (owns a lot of memory) and idle (is doing nothing useful
with it). If you do manage it, you will of course be preventing
other, non-idle programs from using the memory devoted to NetBeans.
Only you can say whether that is a good or bad idea.
--
Eric Sosman
esosman@ieee-dot-org.invalid