Re: severe problems with soft and hard commits in a large index

2015-05-06 Thread Dmitry Kan
Do you seen any (a lot?) of the warming searchers on deck, i.e. value for N: PERFORMANCE WARNING: Overlapping onDeckSearchers=N On Wed, May 6, 2015 at 10:58 AM, adfel70 adfe...@gmail.com wrote: Hello I have a cluster of 16 shards, 3 replicas. the cluster indexed nested documents. it

Re: severe problems with soft and hard commits in a large index

2015-05-06 Thread Toke Eskildsen
On Wed, 2015-05-06 at 00:58 -0700, adfel70 wrote: each shard has around 200 million docs. size of each shard is 250GB. this runs on 12 machines. each machine has 4 SSD disks and 4 solr processes. each process has 28GB heap. each machine has 196GB RAM. [...] 1. heavy GCs when soft commit is

Re: severe problems with soft and hard commits in a large index

2015-05-06 Thread adfel70
1. yes, I'm sure that pauses are due to GCs. I monitor the cluster and receive continuously metric from system and from java process. I see clearly that when soft commit is triggered, major GCs start occurring (sometimes reocuuring on the same process) and latency rises. I use CMS GC and jdk

severe problems with soft and hard commits in a large index

2015-05-06 Thread adfel70
Hello I have a cluster of 16 shards, 3 replicas. the cluster indexed nested documents. it currently has 3 billion documents overall (parent and children). each shard has around 200 million docs. size of each shard is 250GB. this runs on 12 machines. each machine has 4 SSD disks and 4 solr

Re: severe problems with soft and hard commits in a large index

2015-05-06 Thread adfel70
Thank you for the detailed answer. How can I decrease the impact of opening a searcher in such a large index? especially the impact of heap usage that causes OOM. regarding GC tuning - I am doint that. here are the params I use: AggresiveOpts UseLargePages ParallelRefProcEnabled

Re: severe problems with soft and hard commits in a large index

2015-05-06 Thread adfel70
I dont see any of these. I've seen them before in other clusters and uses of SOLR but don't see any of these messages here. Dmitry Kan-2 wrote Do you seen any (a lot?) of the warming searchers on deck, i.e. value for N: PERFORMANCE WARNING: Overlapping onDeckSearchers=N On Wed, May 6,

Re: severe problems with soft and hard commits in a large index

2015-05-06 Thread Shawn Heisey
On 5/6/2015 1:58 AM, adfel70 wrote: I have a cluster of 16 shards, 3 replicas. the cluster indexed nested documents. it currently has 3 billion documents overall (parent and children). each shard has around 200 million docs. size of each shard is 250GB. this runs on 12 machines. each machine

Re: severe problems with soft and hard commits in a large index

2015-05-06 Thread Shawn Heisey
On 5/6/2015 8:55 AM, adfel70 wrote: Thank you for the detailed answer. How can I decrease the impact of opening a searcher in such a large index? especially the impact of heap usage that causes OOM. See the wiki link I sent. It talks about some of the things that require a lot of heap and