# Merge Thread busy even when refresh\_interval disabled for indexing

**URL:** <https://discuss.elastic.co/t/merge-thread-busy-even-when-refresh-interval-disabled-for-indexing/27657>\
**Category:** Elasticsearch\
**Created:** [August 19, 2015, 9:37am UTC](https://discuss.elastic.co/t/merge-thread-busy-even-when-refresh-interval-disabled-for-indexing/27657 "2015-08-19T09:37:17Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![lisak](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lisak/32/618_2.png) [@lisak](https://discuss.elastic.co/u/lisak)\
**Post date:** [October 21, 2015, 5:47pm UTC](https://discuss.elastic.co/t/merge-thread-busy-even-when-refresh-interval-disabled-for-indexing/27657/7 "2015-10-21T17:47:53Z")

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Btw this documenting nicely what happens, merging is falling behind exactly for some time, then it all performs well :

> 15:05:25,915][INFO][indices.store] [es-884a70a1805147db95b8a28e776cd59a] updating indices.store.throttle.type from [merge] to [none]  
> 15:05:25,966][INFO][index.shard] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][4] updating refresh\_interval from [1s] to [-1]  
> 15:05:25,971][INFO][index.shard] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][0] updating refresh\_interval from [1s] to [-1]  
> 15:05:25,974][INFO][index.shard] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][2] updating refresh\_interval from [1s] to [-1]  
> 15:05:25,974][INFO][index.shard] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][3] updating refresh\_interval from [1s] to [-1]  
> 15:05:25,974][INFO][index.shard] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][1] updating refresh\_interval from [1s] to [-1]  
> 15:05:26,731][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][4] now throttling indexing: numMergesInFlight=4, maxNumMerges=3  
> 15:05:26,807][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][0] now throttling indexing: numMergesInFlight=4, maxNumMerges=3  
> 15:05:26,865][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][2] now throttling indexing: numMergesInFlight=4, maxNumMerges=3  
> 15:05:26,922][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][4] stop throttling indexing: numMergesInFlight=2, maxNumMerges=3  
> 15:05:26,979][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][3] now throttling indexing: numMergesInFlight=4, maxNumMerges=3  
> 15:05:27,018][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][1] now throttling indexing: numMergesInFlight=4, maxNumMerges=3  
> 15:05:27,060][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][2] stop throttling indexing: numMergesInFlight=2, maxNumMerges=3  
> 15:05:27,067][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][0] stop throttling indexing: numMergesInFlight=2, maxNumMerges=3  
> 15:05:27,139][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][3] stop throttling indexing: numMergesInFlight=2, maxNumMerges=3  
> 15:05:27,330][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][1] stop throttling indexing: numMergesInFlight=2, maxNumMerges=3  
> 15:05:29,024][INFO][index.engine] [es-884a70a1805147db95b8a28e776cd59a] [mi\_2015\_10\_w4][3] now throttling indexing: numMergesInFlight=4, maxNumMerges=3

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