Hello.
Can anyone comment on the performance impact (positive or negative)
of running Cassandra configured to use large pages under Linux?
Yes, YMMV applies, but I thought I'd ask before enlisting sysadmin Fu, etc.
Thanks!
David
I've seen about a 13% improvement in practice.
-Chris
On Jan 16, 2011, at 4:01 PM, David Dabbs wrote:
Hello.
Can anyone comment on the performance impact (positive or negative)
of running Cassandra configured to use large pages under Linux?
Yes, YMMV applies, but I thought I'd ask before
Chris, could you provide some more info on you experience? Were you using
mmapped files? Using row or key caches? What were the memtabe thresholds? Using
mlockall() ?
There are a couple of issues listed in the first paragraphs here that at first
glance may cause issues
-Original Message-
From: Aaron Morton [mailto:aa...@thelastpickle.com]
Sent: Sunday, January 16, 2011 7:07 PM
To: user@cassandra.apache.org
Subject: Re: Cassandra and -XX:+UseLargePages
Chris, could you provide some more info on you experience? Were you using
mmapped files? Using row
long enough.AOn 17 Jan, 2011,at 02:37 PM, David Dabbs dmda...@gmail.com wrote:
-Original Message-
From: Aaron Morton [mailto:aa...@thelastpickle.com]
Sent: Sunday, January 16, 2011 7:07 PM
To: user@cassandra.apache.org
Subject: Re: Cassandra and -XX:+UseLargePages
Chris, could you