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https://issues.apache.org/jira/browse/CASSANDRA-2845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13220627#comment-13220627
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tyler cheung edited comment on CASSANDRA-2845 at 3/2/12 2:44 AM:
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OK - so what happened was I manually put in libjna 3.4.0 files (copied the
tarball and redid the symlinks). The /etc/init.d script didn't work but the
sudo /usr/sbin/cassandra did, and things seem to work a lot better.
They just moved my office and I have a new core i5 w/ 4 gb RAM. I just redid
the cassandra install w/ vanilla 11.10 (libjna 3.2.7), openjre6, jsvc1.0.6.
There was a brief hiccup but its running. Top shows jsvc running cassandra
consuming 35% memory as follows:
Cpu(s): 0.2%us, 0.2%sy, 0.0%ni, 99.6%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3934168k total, 3805184k used, 128984k free, 175792k buffers
Swap: 4071420k total, 26532k used, 4044888k free, 1083252k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20452 root 20 0 166m 13m 8640 S 1 0.4 1:37.09 Xorg
21906 tylerc 20 0 453m 16m 10m S 1 0.4 0:02.43 xfce4-terminal
21337 tylerc 20 0 172m 12m 8704 S 0 0.3 0:10.59 xfwm4
21433 tylerc 20 0 698m 105m 38m S 0 2.7 2:59.83 chrome
23067 tylerc 20 0 864m 59m 16m S 0 1.6 0:01.94 chrome
23735 cassandr 20 0 1518m 1.3g 18m S 0 35.1 0:01.90 jsvc
...
I'm going to try and get the newer libjna again and see if this helps memory
usage. Kernel is 3.0.0.12 generic.
was (Author: tcheung):
OK - so what happened was I manually put in libjna 3.4.0 files (copied the
tarball and redid the symlinks). The /etc/init.d script didn't work but the
sudo /usr/sbin/cassandra did, and things seem to work a lot better.
They just moved my office and I have a new core i5 w/ 4 gb RAM. I just redid
the cassandra install w/ vanilla 11.10 (libjna 3.2.7), openjre6, jsvc1.0.6.
There was a brief hiccup but its running. Top shows jsvc running cassandra
consuming 35% memory as follows:
{{monospaced}}
Cpu(s): 0.2%us, 0.2%sy, 0.0%ni, 99.6%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3934168k total, 3805184k used, 128984k free, 175792k buffers
Swap: 4071420k total, 26532k used, 4044888k free, 1083252k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20452 root 20 0 166m 13m 8640 S 1 0.4 1:37.09 Xorg
21906 tylerc 20 0 453m 16m 10m S 1 0.4 0:02.43 xfce4-terminal
21337 tylerc 20 0 172m 12m 8704 S 0 0.3 0:10.59 xfwm4
21433 tylerc 20 0 698m 105m 38m S 0 2.7 2:59.83 chrome
23067 tylerc 20 0 864m 59m 16m S 0 1.6 0:01.94 chrome
23735 cassandr 20 0 1518m 1.3g 18m S 0 35.1 0:01.90 jsvc
...
{{monospaced}}
I'm going to try and get the newer libjna again and see if this helps. Kernel
is 3.0.0.12 generic.
> Cassandra uses 100% system CPU on Ubuntu Natty (11.04)
> ------------------------------------------------------
>
> Key: CASSANDRA-2845
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2845
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.8.0
> Environment: Default install of Ubuntu 11.04
> Reporter: Steve Corona
> Assignee: paul cannon
> Priority: Critical
> Fix For: 0.8.2
>
>
> Step 1. Boot up a brand new, default Ubuntu 11.04 Server install
> Step 2. Install Cassandra from Apache APT Respository (deb
> http://www.apache.org/dist/cassandra/debian 08x main)
> Step 3. apt-get install cassandra, as soon as it cassandra starts it will
> freeze the machine
> What's happening is that as soon as cassandra starts up it immediately sucks
> up 100% of CPU and starves the machine. This effectively bricks the box until
> you boot into single user mode and disable the cassandra init.d script.
> Under htop, the CPU usage shows up as "system" cpu, not user.
> The machine I'm testing this on is a Quad-Core Sandy Bridge w/ 16GB of
> Memory, so it's not a system resource issue. I've also tested this on
> completely different hardware (Dual 64-Bit Xeons & AMD X4) and it has the
> same effect.
> Ubuntu 10.10 does not exhibit the same issue. I have only tested 0.8 and
> 0.8.1.
> root@cassandra01:/# java -version
> java version "1.6.0_22"
> OpenJDK Runtime Environment (IcedTea6 1.10.2) (6b22-1.10.2-0ubuntu1~11.04.1)
> OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)
> root@cassandra:/# uname -a
> Linux cassandra01 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC
> 2011 x86_64 x86_64 x86_64 GNU/Linux
> /proc/cpu
> Intel(R) Xeon(R) CPU E31270 @ 3.40GHz
> /proc/meminfo
> MemTotal: 16459776 kB
> MemFree: 14190708 kB
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