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| RHEL 6 and WMQ 7.0.1 |
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| Author |
Message
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| Gideon |
 Posted: Mon Apr 25, 2011 11:44 am Post subject: RHEL 6 and WMQ 7.0.1 |
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Chevalier
Joined: 18 Aug 2009
Posts: 403
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Chapter 6 of the installation Guide contained in the Quick
Start Guide references the following link:
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0m0/index.jsp
Which recommends max open files to be in excess of 1024,
and max processes to be 4096, amoung other kernal
recommendations.:
I have the following configurations on RHEL 6:
| Code: |
[root@WEST5 etc]# pwd
/etc
[root@WEST5 etc]# sysctl -p sysctl.conf
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
error: "net.bridge.bridge-nf-call-ip6tables" is an unknown
key
error: "net.bridge.bridge-nf-call-iptables" is an unknown
key
error: "net.bridge.bridge-nf-call-arptables" is an unknown
key
kernel.msgmni = 1024
kernel.shmmni = 4096
kernel.shmall = 2097152
kernel.sem = 500 256000 250 1024
net.ipv4.tcp_keepalive_time = 300
fs.file-max = 32768
[root@WEST5 etc]# cd /proc/sys/kernel
[root@WEST5 kernel]# cat msgmni
1024
[root@WEST5 kernel]# cat shmmni
4096
[root@WEST5 kernel]# cat shmall
2097152
[root@WEST5 kernel]# cat sem
500 256000 250 1024
[root@WEST5 kernel]# cat file-max
cat: file-max: No such file or directory
[root@WEST5 kernel]# cd ..
[root@WEST5 sys]# cd fs
[root@WEST5 fs]# cat file-max
32768
[root@WEST5 fs]# ulimit -Ha
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 1161386
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 32768
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) unlimited
cpu time (seconds, -t) unlimited
max user processes (-u) 1161386
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited |
However, the error I am currently getting is:
| Code: |
| Build Type :- IKAP - (Production)
|
| Effective UserID :- 495 (mqm)
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| Real UserID :- UNKNOWN
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| Program Name :- amqzlaa0
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| Addressing mode :- 64-bit
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| Process :- 8562
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| Process(Thread) :- 8562
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| Thread :- 1
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| ThreadingModel :- PosixThreads
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| UserApp :- FALSE
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| Last HQC :- 0.0.0-0
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| Last HSHMEMB :- 0.0.0-0
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| Major Errorcode :- xecF_E_UNEXPECTED_SYSTEM_RC
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| Minor Errorcode :- OK
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| Probe Type :- MSGAMQ6119
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| Probe Severity :- 2
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| Probe Description :- AMQ6119: An internal WebSphere MQ
error has occurred |
| ('11 - Resource temporarily unavailable' from
pthread_create.) |
| FDCSequenceNumber :- 0
|
| Arith1 :- 11 (0xb)
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| Comment1 :- '11 - Resource temporarily
unavailable' from |
| pthread_create. |
WHile there is no maximum number of threads per process in
Linux, there is a maximum number of threads:
[root@WEST5 ~]# cd /proc
[root@WEST5 proc]# cd sys
[root@WEST5 sys]# cd kernel
[root@WEST5 kernel]# cat threads-max
2322773
This seems will within the norm
The problems start occurring when I create a qmgr
(connected to a broker) with the following parameters:
| Code: |
Channels:
MQIBindType=FASTPATH
MaxChannels=1000
MaxActiveChannels=1000 |
The large number of channels seems to thow it off.
This never happened with RHEL 5.x, only with RHEL 6. RHEL
6 is known for having a very tight default configuration
setup. I have examined all of the isntallation parameters
and they appear to be within the recommended configuration.
Any ideas ? |
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