Re: Stack size limits
Re: Stack size limits
- Subject: Re: Stack size limits
- From: Tom Lane <email@hidden>
- Date: Tue, 11 Jul 2017 10:59:57 -0400
- Comments: In-reply-to "David Ledger" <email@hidden> message dated "Tue, 11 Jul 2017 15:46:19 +0100"
"David Ledger" <email@hidden> writes:
> On 11 Jul 2017, at 14:18, Volker Blum wrote:
>> When I open a new xterm, and say ulimit -a, I get:
>> stack size (kbytes, -s) 512
> I’m running a Mac mini at 10.6.8, Darwin Kernel Version 10.8.0, and a
> MBP at 10.11.6, Darwin Kernel Version 15.6.0. Without me doing anything
> other than exec’ing a ksh both give me a stack size of 8192K. A
> ‘Terminal’ window gives the same.
Yes, I get the same results as David; also
$ ulimit -a -H
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
max locked memory (kbytes, -l) unlimited
max memory size (kbytes, -m) unlimited
open files (-n) unlimited
pipe size (512 bytes, -p) 1
stack size (kbytes, -s) 65532
cpu time (seconds, -t) unlimited
max user processes (-u) 1064
virtual memory (kbytes, -v) unlimited
which shows (and experimentation confirms) that I can set the stack size
limit to anything under 64M.
There's some useful info here
https://developer.apple.com/library/content/qa/qa1419/_index.html
which suggests that a 512K stack is what macOS defaults to for a
pthread. I doubt your shell per se would have become threaded,
but maybe it was launched from a thread of a multithreaded program.
I wonder if you have anything unusual in your ~/.bashrc, X startup
scripts, etc.
regards, tom lane
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