pac system-statistics

gistfile1.txt

## System configurations

get following informations by root

### files:

/etc/security/limits.conf
/proc/cpuinfo

### commands:

sysctl -a
netstat -i | awk '{print $1}' | xargs -i ethtool {}
iptables -L
crontab -l
lspci -vvv
dmesg
df
mount
lsblk


## Application configurations

get following informations by cassandra-user

### files:

conf/cassandra-env.sh
conf/cassandra.yaml
conf/cassandra-topology.properties
conf/log4j-server.properties

### commands:

ulimit -a
cassandra-cli -h <cassandra_host> -p <thrift_port>
cassandra-cli> show keyspaces;
cassandra-cli> exit;


# while testing

## System statistics

sar, netstat, top information

if there are not sar, following commads install it
yum install sar
sar/iostat

I attached sample to get statistics informations each 10 seconds(smpl.sh)

## Application statistics

### nodetool

nodetool -h 10.196.4.36 -p 8082 cfstats
For example, to get the information each 10 seconds.
for i in 1 2 3 4 5 6; do  nodetool -h 10.196.4.36 -p 8082 cfstats ; sleep 10 ; done  | awk '{ print strftime("%Y-%m-%dT%H:%M:%S"), $0; fflush() }'

nodetool -h 10.196.4.36 -p 8082  cfhistograms <keyspace> <cfname>


### GC informations

please commented in following GC log output configurations

# GC logging options -- uncomment to enable
# JVM_OPTS="$JVM_OPTS -XX:+PrintGCDetails"
# JVM_OPTS="$JVM_OPTS -XX:+PrintGCDateStamps"
# JVM_OPTS="$JVM_OPTS -XX:+PrintHeapAtGC"
# JVM_OPTS="$JVM_OPTS -XX:+PrintTenuringDistribution"
# JVM_OPTS="$JVM_OPTS -XX:+PrintGCApplicationStoppedTime"
# JVM_OPTS="$JVM_OPTS -XX:+PrintPromotionFailure"
# JVM_OPTS="$JVM_OPTS -XX:PrintFLSStatistics=1"
# JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc-`date +%s`.log"
# If you are using JDK 6u34 7u2 or later you can enable GC log rotation
# don't stick the date in the log name if rotation is on.
# JVM_OPTS="$JVM_OPTS -XX:+UseGCLogFileRotation"
# JVM_OPTS="$JVM_OPTS -XX:NumberOfGCLogFiles=10"
# JVM_OPTS="$JVM_OPTS -XX:GCLogFileSize=10M"