Re: Weirdest problem on this mailing list

On 22/05/17 15:24, Hannu Kröger wrote: > Hello, > > For some reason the emails I sent to this Cassandra email list end up to > PayPal support email. Can some list admin check if there is something weird > in the list configuration or if some funny person added PayPal support > address to

Bottleneck for small inserts?

Hi all: I'm new to Cassandra and I'm doing some performance testing. One of things that I'm testing is ingestion throughput. My server setup is: - 3 node cluster - SSD data (both commit log and sstables are on the same disk) - 64 GB RAM per server - 48 cores per server -

Re: Bottleneck for small inserts?

How many CPUs are you using for interrupts? http://www.alexonlinux.com/smp-affinity-and-proper-interrupt-handling-in-linux Have you tried making a flame graph to see where Cassandra is spending its time? http://www.brendangregg.com/blog/2014-06-12/java-flame-graphs.html Are you tracking GC

Re: memtable_allocation_type on Cassandra 2.1.x

I believe off-heap storage was reintroduced in 3.4 ( https://issues.apache.org/jira/browse/CASSANDRA-9472). It was removed from 3.0 due to the refactoring of the storage engine. Check out http://www.datastax.com/dev/blog/off-heap-memtables-in-Cassandra-2-1 to get an overview of the pros and cons

EC2 instance recommendations

Hi – We’ve been running M4.2xlarge EC2 instances with 2-3 TB of storage and have been comparing this to I-3.2xlarge, which seems more cost effective when dealing with this amount of storage and from an IOPS perspective. Does anyone have any recommendations/ on the I-3s and how it performs

memtable_allocation_type on Cassandra 2.1.x

Hi Experts, I have some concerns regarding memtable parameters for my current version. 2.1.8. As per documentation , its mentioned to have Off-heap memtables in Cassandra 2.1 . And in releases 3.2.0 and 3.2.1, the only option that works is: heap-buffers. Can you Please suggest what value

Slowness in C* cluster after implementing multiple network interface configuration.

Hi All , Need Help !!! Setup Details: Cassandra 2.0.14 Geo Red setup * DC1 - 3 nodes * DC2 - 3 nodes We were trying to implement multiple network interfaces with Cassandra 2.0.14 After doing all the steps mentioned in DataStax doc

Weirdest problem on this mailing list

Hello, For some reason the emails I sent to this Cassandra email list end up to PayPal support email. Can some list admin check if there is something weird in the list configuration or if some funny person added PayPal support address to mailing list? Cheers, Hannu