your "beautified" version is very fine.
Actually, i have to admit, i tried to make it into the FAQ some time in the past with the "maxdata" solution. However i never got any reaction as a result to this post: http://www.squid-cache.org/mail-archive/squid-users/200103/0238.html
(Posting it to the list however is still helpful as google finds it.)
Maybe your summary has better chances.
Best Regards
Matthias Weigel
Gerard Eviston wrote:
IMHO your notes are very helpful.
To help get it into the FAQ I've tried to summarise your comments. Also I couldn't resist the chance to sneak in one of my own :-). I haven't actually tested the LDR_CNTRL solution though.
Matthias - have I represented you correctly?
Henrik / FAQ maintainer - can this go in the FAQ?
Regard
Gerard
----
System-Dependant Wierdness
14.9 AIX
"shmat failed" errors with diskd
32-bit processes on AIX 4.2.1 and later are restricted by default to a maximum of 11 shared memory segments. This restriction can be removed by setting the environment variable EXTSHM=ON in the script or shell which starts squid.
Core dumps when squid process grows to 256MB
32-bit processes cannot use more than 256MB of stack and data in the default memory model. To force the loader to use large address space for squid, either:
o set LDR_CNTRL environment variable, eg LDR_CNTRL="MAXDATA=0x80000000"; or
o link with -bmaxdata:0x80000000; or
o patch the squid binary
See http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/aixprggd/genprogc/lrg_prg_support.htm for more information, including how to patch an already-compiled program.
----
On Fri, 24 Jan 2003 19:41, Matthias Weigel wrote:
Hello squid-users,.
when using squid with diskd, certain semaphore and messagequeue limits
must be set to make squid happy. See the FAQs diskd section for details.
On AIX you cannot modify these limits (at least i could not find out how
to do it).
When you try to start squid with "cache_dir diskd" entries in
squid.conf, squid crashes with the following error in cache.log:
[...]
"shmat failed".
The Fix:
set the following environment variable in your startup script or in
RunCache script:
EXTSHM=ON
export EXTSHM
This modifies some AIX shared memory policy to be more flexible. See
"man shmat" for details.
After setting this environment variable, squid is running fine for me
with diskd on AIX.
This was tested on AIX 4.3.3 on a 32bit processor but probably applies
to other versions as well.
Hope this is helpful.
Best Regards
Matthias Weigel
ISOnova GmbH
