I spent a bit of quality time with our log files; the main finding:
of the 331679 lines that contain ERROR
143433 also say 'Client closed the connection before file download was
complete’
These closures happen from all sorts of IP addresses.
According to the time command it takes 1.75sec (elapsed) to do a wget on a 18MB
bitstream, which gives a speed of 10.6MB/sec. Speed test tells me that my
connection has 95 Mbps, so I can’t really expect much more.
Are clients impatient ? Is my instances performance erratic ?
I have a reasonable amount of UNIX knowledge, but not necessarily the sys admin
kind and no real experience performance tuning the
apache/tomcat/jsp/java/oracle stack. The instance runs in a VM; Our asset store
is mounted from a remote file system and our database is on a different remote
server. The instance is in general not all that fast. No hard numbers, its just
visibly sluggish.
How do I go about investigating performance issues ? I recall seeing some info
on the DSPACE wiki - but I could not rediscover it. Does anybody have tips or
links to good HowTos ?
Monika
________________
Monika Mevenkamp
phone: 609-258-4161
693 Alexander Road, Princeton University, Princeton, NJ 08544
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