Dear Björn,
While i don't see the direct connection between your changed
settings and error with EAGAIN, there are apparently
misconfiguration in the snippet of your config file which
are related to the changed settings:
1) If you have maxthreads defined as 10, then your first
db-pool should have at least 10 db-connections. Note, that
you might have in your app as well scheduled procs that will
use as well db-connections; 15 might be a good value.
2) In the pools parameter, you have to enlist you pools
(pools "*" is not allowed for new aolservers, use in your
example "pool1,pool2,pool3" instead of the "*").
For an example of the config file, see:
http://cvs.openacs.org/browse/OpenACS/openacs-4/etc/config.tcl?r=HEAD
-gustaf neumann
On 01.12.10 16:25, Björn Þór Jónsson wrote:
Hi,
The server has been rock stable since I changed
ns_param maxconnections 5
to
ns_param maxconnections 100
and from
ns_param maxthreads 5
to
ns_param maxthreads 10
"ulimit -u" says: unlimited
and /etc/security/limits.conf has all lines commented out.
Thanks for the help :)
/Björn
2010/11/22 Gustaf Neumann <neum...@wu.ac.at
<mailto:neum...@wu.ac.at>>
Dear Björn,
The error indicates that /pthread_create /returned EAGAIN
(paraphrased as "Resource temporarily unavailable").
This error indicates that
"the system lacked the necessary resources to create
another thread, or the system-imposed limit on the
total
number of threads in a process {PTHREAD_THREADS_MAX}
would be exceeded. " (from
http://linux.die.net/man/3/pthread_create).
so, for the user, under which the server runs, check
"ulimit -u",
limits.conf, etc. Can it be that you switched to a new
machine with lower
limits than before?
What is you setting of maxthreads?
-gustaf neumann
Am 18.11.10 17:13, schrieb Björn Þór Jónsson:
Hi,
After recently upgrading from AOLserver 4.5.0 to
4.5.1 and from nspostgres-4.0 to nspostgres-4.1 the
server is repeatedly crashing (when it gets hammered
by the google bots). The error.log has many entries
like these before the server dies:
[17/Nov/2010:02:18:42][700.3218660208][-default:6195-] Notice:
exiting: exceeded max connections per thread
[17/Nov/2010:02:18:43][700.3217636208][-default:6193-] Notice:
exiting: exceeded max connections per thread
[17/Nov/2010:02:18:44][700.3219172208][-default:6196-] Notice:
exiting: exceeded max connections per thread
[17/Nov/2010:02:18:45][700.3218148208][-default:6194-] Error:
Tcl exception:
adp flush failed: connection closed
abort exception raised
while processing connection #31907:
GET ...
Host: localhost:8006
...
nsthreads: pthread_create failed in NsCreateThread:
Resource temporarily unavailable [this is the last
line in the log before the crash]
This is the database section of the AOLserver config
file:
ns_section "ns/db/drivers"
ns_param postgres nspostgres.so
ns_section ns/db/pools
ns_param pool1 "Pool 1"
ns_param pool2 "Pool 2"
ns_param pool3 "Pool 3"
ns_section ns/db/pool/pool1
ns_param maxidle 1000000000
ns_param maxopen 1000000000
ns_param connections 5
ns_param extendedtableinfo true
ns_param driver postgres
ns_param datasource localhost::${db_name}
ns_param user $user_account
ns_section ns/db/pool/pool2
ns_param maxidle 1000000000
ns_param maxopen 1000000000
ns_param connections 5
ns_param extendedtableinfo true
ns_param driver postgres
ns_param datasource localhost::${db_name}
ns_param user $user_account
ns_section ns/db/pool/pool3
ns_param maxidle 1000000000
ns_param maxopen 1000000000
ns_param connections 5
ns_param extendedtableinfo true
ns_param driver postgres
ns_param datasource localhost::${db_name}
ns_param user $user_account
ns_section ns/server/${server}/db
ns_param pools "*"
ns_param defaultpool pool1
The server is running on Ubuntu 10.04.1 LTS
2.6.32-25-generic-pae #45-Ubuntu SMP Sat Oct 16
21:01:33 UTC 2010 i686 GNU/Linux
Is there anything I should configure differently or
has any other ideas what might be causing this?
/Björn
--
Björn Þór Jónsson
http://bthj.is
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--
Univ.Prof. Dr. Gustaf Neumann
Institute of Information Systems and New Media
WU Vienna
Augasse 2-6, A-1090 Vienna, AUSTRIA
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Björn Þór Jónsson
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