Hi,
I've recently rebuild one of instalaltions to the following:
1. Dual Quad Core, 4GB RAM (helioos): Runs apache with Midgard 1.8.4 and
MidCOM 2.8 and few other non midgard sites that are not too heavy. It has
NFS mounted /var/www with docroots and NFS monuter /usr/share/pear/midcom.
2. Dual Core2Duo, 4GB RAM (dragoon): Runs mainly SQL for helioos and few
sites that are mostly intranet like sites for managing data used by sites
run od helioos. It exports /var/www and /usr/share/pear/midcom for helioos.
Problems (serveral):
1. On dragoon, lots of mysql messages like:
Aborted connection 1179872 to db: 'vox_bw' user: 'midgard' host: 'helioos'
(Got timeout reading communication packets)
Aborted connection 1179872 to db: 'vox_bw' user: 'midgard' host: 'helioos'
(Got an error reading communication packets)
same time I got in helioos' apache log:
PHP Warning: (pid:8626): \n\nQUERY: \n SELECT (some query about midgard
objects) FAILED: \n MySQL server has gone away (some midcom classes) on line
xxx
Which mean that some resuests to Midgard sites are lost.
2. On helioos, a variety of:
[apc-error] apc_fcntl_lock failed: Resource deadlock avoided
...
midgard-lib-ERROR **: Midgard: mgd_select_db(vox_bw) failed: MySQL server
has gone away (1)
aborting...
[Fri Oct 19 07:43:54 2007] [notice] child pid 8492 exit signal Aborted (6)
...
3. Finally, sometimes apache on helioos hangs, spawnig hundreds of children
that all say:
[notice] child pid 29937 exit signal Segmentation fault (11)
The only remedy I found so far is apache restart on helioos, but it's not an
option.
The configuration:
apache on helioos (prefork MPM):
EnableMMAP off
EnableSendfile off
KeepAlive On
MaxKeepAliveRequests 200
KeepAliveTimeout 1
StartServers 40
MinSpareServers 10
MaxSpareServers 20
ServerLimit 5000
MaxClients 5000
MaxRequestsPerChild 4000
exports on dragoon:
/var/www x.x.x.x(rw,wdelay,no_root_squash,no_subtree_check)
/usr/share/pear/midcom
x.x.x.x(rw,wdelay,no_root_squash,no_subtree_check)
fstab on helioos
dragoon:/var/www/ /var/www nfs
rw,nolock,noatime,nfsvers=3,rsize=8192,wsize=8192,hard,intr 0 0
dragoon:/usr/share/pear/midcom /usr/share/pear/midcom nfs
rw,nolock,noatime,nfsvers=3,rsize=8192,wsize=8192,hard,intr 0 0
I tried to find some clues on google but no success. Anyone, please? :)
Solt
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