ElasticSearch: What is the param limit in painless scripting? - elasticsearch

Question

I will have documents with the following data -
1. id
2. user_id
3. online_hr
4. offline_hr
My use case is the following -
I wish to sort the users who are active using online_hr field,
While I want to sort the users who are inactive using the offline_hr field.
I am planning to use ElasticSearch painless script for this use case,
I will have using 2 arrays of online_user_list and offline_user_list into the script params,
And I plan to compare each document's user_id,
if it is present in the either of the params lists and sort accordingly.
I want to know if there is any limit to the param object,
As the userbase may be in 100s of thousands,
And if passing 2 lists of that size in the ES scripting params would be troublesome?
And if there is any better approach?
Query to add data -
POST /products/_doc/1
{
"id":1,
"user_id" : "1",
"online_hr" : "1",
"offline_hr" : "2"
}
Sample data -
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "1",
"_score" : 1.0,
"_source" : {
"id" : 1,
"user_id" : "1",
"online_hr" : "1",
"offline_hr" : "2"
}
}
]
}
}
Mapping -
{
"products" : {
"aliases" : { },
"mappings" : {
"properties" : {
"id" : {
"type" : "long"
},
"offline_hr" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"online_hr" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"user_id" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
}
}
},
"settings" : {
"index" : {
"creation_date" : "1566466257331",
"number_of_shards" : "1",
"number_of_replicas" : "1",
"uuid" : "g2F3UlxQSseHRisVinulYQ",
"version" : {
"created" : "7020099"
},
"provided_name" : "products"
}
}
}
}
I found Painless scripts have a default size limit of 65,535 bytes,
while the ElasticSearch compiler had a limit of 16834 characters
Reference -
https://www.elastic.co/guide/en/elasticsearch/painless/current/painless-walkthrough.html
https://www.elastic.co/guide/en/elasticsearch/painless/current/painless-sort-context.html