In /etc/sysctl update these fs.file-max net.ipv4.ip_local_port_range net.core.rmem_default net.core.rmem_max net.core.wmem_default net.core.wmem_max kernel.shmall kernel.shmmax kernel.shmmni kernel.sem
Misaligned partitions (and filesystems) cause increased i/o.
See eg 3Par doc: http://h20195.www2.hp.com/V2/GetPDF.aspx%2F4AA4-4519ENW.pdf “All RAID devices, including HP 3PAR arrays, incur the overhead of calculating new parity after a write. A single write that spans two RAID sets will require two parity calculations. Aligning Linux disk partitions to…
Getting JBoss Connection Pool information
twiddle.sh -s localhost:1099 -u admin -p admin invoke jboss.jca:service=ManagedConnectionPool,name=ExampleDS listFormattedSubPoolStatistics