Re: Problem with dropped mutations

2018-07-02 Thread Jeff Jirsa
mark! >> >> You can also check if network isn't dropping packets (ifconfig -a tool) + >> storage (dstat tool) isn't reporting too slow disks. >> >> Cheers/Asad >> >> >> -Original Message- >> From: Hannu Kröger [mailto:hkro...@

Re: Problem with dropped mutations

2018-07-02 Thread Hannu Kröger
, June 26, 2018 9:49 AM > To: user > Subject: Problem with dropped mutations > > Hello, > > We have a cluster with somewhat heavy load and we are seeing dropped > mutations (variable amount and not all nodes have those). > > Are there some clear trigger which cause those? W

RE: Problem with dropped mutations

2018-06-26 Thread ZAIDI, ASAD A
) + storage (dstat tool) isn't reporting too slow disks. Cheers/Asad -Original Message- From: Hannu Kröger [mailto:hkro...@gmail.com] Sent: Tuesday, June 26, 2018 9:49 AM To: user Subject: Problem with dropped mutations Hello, We have a cluster with somewhat heavy load and we are seeing

Re: Problem with dropped mutations

2018-06-26 Thread Joshua Galbraith
Hannu, Dropped mutations are often a sign of load-shedding due to an overloaded node or cluster. Are you seeing resource saturation like high CPU usage (because the write path is usually CPU-bound) on any of the nodes in your cluster? Some potential contributing factors that might be causing you

Problem with dropped mutations

2018-06-26 Thread Hannu Kröger
Hello, We have a cluster with somewhat heavy load and we are seeing dropped mutations (variable amount and not all nodes have those). Are there some clear trigger which cause those? What would be the best pragmatic approach to start debugging those? We have already added more memory which