> From: Rainer Frey (Inxmail GmbH) [mailto:
frey@...]
> Subject: Re: Question regarding Tomcat memory
>
> AFAIK the default stack size of the JVM on 64bit linux is 2M.
No, it's 1M for Linux (and Solaris) on AMD64 (at least on JDK 6u7) - the same as the OP was trying to set. For Linux IA64 and Windows AMD64, the system default is used.
> Setting Xss to a lower value reduces memory footprint of
> a single thread, and thus allows for more threads and/or
> larger heap with same amount of physical memory.
While true in theory, it's all virtual space, not RAM, so there's no additional contention for pages of physical memory. The size of the process space in 64-bit Linux is so huge that you run into the kernel's limit on the number of threads long before the stack size has any impact on the available process space.
- Chuck
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