*** This bug is a duplicate of bug 879334 ***
https://bugs.launchpad.net/bugs/879334
We also see this problem in our network.
Our setup with NO problems:
SERVER1 NFS server running Ubuntu 11.10 (Kernel 3.0.0-12-server) (2 x Quadcore
Xeon 2.4GHz 16GB Ram)
SERVER2 Webserver running Ubuntu 8.04 (Kernel 2.6.27.7) (Dualcore Xeon 3.00GHz
2GB Ram)
SERVER3 Webserver running Ubuntu 12.04 (Kernel 3.2.0-29-generic) (2 x Quadcode
Xeon 2.5GHz 8GB Ram)
SERVER4 Webserver running Ubuntu 11.10 (Kernel 3.0.0-12-server) (2 x Quadcore
Xeon 2.4GHz 16GB Ram)
All webserver get there content from the NFS server.
We updated the 8.04 server to 12.04 (Kernel 3.2.0-23-generic-pae) and the
problems started.
We did apache benchmark tests, when using SERVER4: no problems. Running the
same test on SERVER 2 or 3 the load of both SERVER 2 & 3 go sky high (loads of
200+ seen)
I watched nfsiostat on SERVER 2 when running the apache benchmark on
SERVER 3 and the read/write where 0.00 but the op/s where somewehe
around 1200.00
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https://bugs.launchpad.net/bugs/1006446
Title:
nfs4 causes enormous load in ubuntu-server making it unusable
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