diff --git a/docs/reference/modules/cluster/misc.asciidoc b/docs/reference/modules/cluster/misc.asciidoc index fcf3491fb25..9e28da7391e 100644 --- a/docs/reference/modules/cluster/misc.asciidoc +++ b/docs/reference/modules/cluster/misc.asciidoc @@ -30,6 +30,11 @@ There is a soft limit on the number of shards in a cluster, based on the number of nodes in the cluster. This is intended to prevent operations which may unintentionally destabilize the cluster. +IMPORTANT: This limit is intended as a safety net, not a sizing recommendation. The +exact number of shards your cluster can safely support depends on your hardware +configuration and workload, but should remain well below this limit in almost +all cases, as the default limit is set quite high. + If an operation, such as creating a new index, restoring a snapshot of an index, or opening a closed index would lead to the number of shards in the cluster going over this limit, the operation will fail with an error indicating the @@ -53,8 +58,8 @@ adjusted using the following property: Controls the number of shards allowed in the cluster per data node. For example, a 3-node cluster with the default setting would allow 3,000 shards -total, across all open indexes. If the above setting is changed to 1,500, then -the cluster would allow 4,500 shards total. +total, across all open indexes. If the above setting is changed to 500, then +the cluster would allow 1,500 shards total. NOTE: If there are no data nodes in the cluster, the limit will not be enforced. This allows the creation of indices during cluster creation if dedicated master