Cassandra Performance Tuning

a#Cassandra Performance Tuning

Cassandra Performance Tuning

change-commit-log-location-1

root@ip-10-0-0-24:[/root]
$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             124G   78G   40G  67% /
/dev/sda2             50G   2G   46G  1% /mnt/commitlog
none                  3.8G 1007M  2.8G  27% /dev/shm

change-commit-log-location-2

root@ip-10-0-0-24:[/root]
$ chown cassandra:cassandra /mnt/commitlog
root@ip-10-0-0-24:[/root]
$ chmod 755 /mnt/commitlog

nodetool-cfstats

[root@ip-10-0-0-57 ~]# bin/nodetool --host ip-10-0-0-57 cfstats
Column Family: Cloud_For_Beginners
...
Key cache capacity: 200000
Key cache size: 200000
Key cache hit rate:  0.568

update_keys_cached

update column family cloud_for_beginners with keys_cached = 300000

update_rows_cached

update column family cloud_for_beginners with rows_cached = 1000