diff --git a/.env.local.sample b/.env.local.sample
index fb3277abb..b962bfd01 100644
--- a/.env.local.sample
+++ b/.env.local.sample
@@ -27,6 +27,9 @@ REDIS_PREFIX=scix_
 # SEARCH
 NEXT_PUBLIC_SEARCH_API_TIMEOUT_MS=30000
 NEXT_PUBLIC_SEARCH_SSR_API_TIMEOUT_MS=30000
+NEXT_PUBLIC_SOLR_HL_MAX_ANALYZED_CHARS=1000000
+NEXT_PUBLIC_SOLR_FACET_LIMIT=2000
+NEXT_PUBLIC_VIS_RESULTS_GRAPH_ROWS=1500
 
 # CRAWLERS
 VERIFIED_BOTS_ACCESS_TOKEN=
diff --git a/src/api/search/models.ts b/src/api/search/models.ts
index 1dbe1dabe..822bb4d58 100644
--- a/src/api/search/models.ts
+++ b/src/api/search/models.ts
@@ -1,4 +1,4 @@
-import { APP_DEFAULTS } from '@/config';
+import { APP_DEFAULTS, HL_MAX_ANALYZED_CHARS, SOLR_FACET_LIMIT } from '@/config';
 import { IADSApiSearchParams, IDocsEntity } from '@/api/search/types';
 
 export const defaultFields: IADSApiSearchParams['fl'] = [
@@ -194,7 +194,7 @@ export const getSearchFacetYearsParams = (params: IADSApiSearchParams): IADSApiS
   'facet.pivot': 'property,year',
   facet: true,
   'facet.mincount': 1,
-  'facet.limit': 2000,
+  'facet.limit': SOLR_FACET_LIMIT,
 });
 
 export const getSearchFacetCitationsParams = (params: IADSApiSearchParams): IADSApiSearchParams => ({
@@ -202,7 +202,7 @@ export const getSearchFacetCitationsParams = (params: IADSApiSearchParams): IADS
   fl: ['id'],
   stats: true,
   'stats.field': 'citation_count',
-  'json.facet': `{"citation_count":{"type":"terms","field":"citation_count","sort":{"index":"desc"},"limit":2000}}`,
+  'json.facet': `{"citation_count":{"type":"terms","field":"citation_count","sort":{"index":"desc"},"limit":${SOLR_FACET_LIMIT}}}`,
 });
 
 export const getSearchFacetReadsParams = (params: IADSApiSearchParams): IADSApiSearchParams => ({
@@ -210,7 +210,7 @@ export const getSearchFacetReadsParams = (params: IADSApiSearchParams): IADSApiS
   fl: ['id'],
   stats: true,
   'stats.field': 'read_count',
-  'json.facet': `{"read_count":{"type":"terms","field":"read_count","sort":{"index":"desc"},"limit":2000}}`,
+  'json.facet': `{"read_count":{"type":"terms","field":"read_count","sort":{"index":"desc"},"limit":${SOLR_FACET_LIMIT}}}`,
 });
 
 export const getSearchStatsParams = (params: IADSApiSearchParams, field: string): IADSApiSearchParams => ({
@@ -225,7 +225,7 @@ export const getHighlightParams = (params: IADSApiSearchParams): IADSApiSearchPa
   fl: ['id'],
   hl: true,
   'hl.fl': 'title,abstract,body,ack,keyword,author',
-  'hl.maxAnalyzedChars': 150000,
+  'hl.maxAnalyzedChars': HL_MAX_ANALYZED_CHARS,
   'hl.requireFieldMatch': true,
   'hl.usePhraseHighlighter': true,
 });
diff --git a/src/api/vis/models.ts b/src/api/vis/models.ts
index 016af8aec..f96cf334f 100644
--- a/src/api/vis/models.ts
+++ b/src/api/vis/models.ts
@@ -1,13 +1,14 @@
 import { mapObjIndexed } from 'ramda';
 import { IADSApiVisParams, IADSApiWordCloudParams } from './types';
 import { IADSApiSearchParams } from '@/api/search/types';
+import { VIS_RESULTS_GRAPH_ROWS } from '@/config';
 
 export const defaultResultsGraphParams: IADSApiSearchParams = {
   q: '*:*',
   sort: ['date desc', 'bibcode desc'],
   fl: ['title', 'bibcode', 'citation_count', 'read_count', 'pubdate'],
   start: 0,
-  rows: 1500,
+  rows: VIS_RESULTS_GRAPH_ROWS,
 };
 
 type ParamValueType = IADSApiSearchParams[keyof IADSApiSearchParams];
diff --git a/src/config.ts b/src/config.ts
index e50885ef3..f645637ec 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -23,14 +23,18 @@ export const APP_DEFAULTS = {
   BIBTEX_DEFAULT_AUTHOR_CUTOFF: 10,
   RESULT_ITEM_PUB_CUTOFF: 50,
   EMPTY_QUERY: '*:*',
-  API_TIMEOUT: 30000,
-  SSR_API_TIMEOUT: 30000,
+  API_TIMEOUT: parseInt(process.env.NEXT_PUBLIC_SEARCH_API_TIMEOUT_MS ?? '30000', 10),
+  SSR_API_TIMEOUT: parseInt(process.env.NEXT_PUBLIC_SEARCH_SSR_API_TIMEOUT_MS ?? '30000', 10),
   PREFERRED_SEARCH_SORT: 'score',
   PREFERRED_LIB_SORT: 'time',
 } as const;
 
 export const GOOGLE_RECAPTCHA_KEY = '6Lex_aQUAAAAAMwJFbdGFeigshN7mRQdbXoGQ7-N';
 
+export const HL_MAX_ANALYZED_CHARS = parseInt(process.env.NEXT_PUBLIC_SOLR_HL_MAX_ANALYZED_CHARS ?? '1000000', 10);
+export const SOLR_FACET_LIMIT = parseInt(process.env.NEXT_PUBLIC_SOLR_FACET_LIMIT ?? '2000', 10);
+export const VIS_RESULTS_GRAPH_ROWS = parseInt(process.env.NEXT_PUBLIC_VIS_RESULTS_GRAPH_ROWS ?? '1500', 10);
+
 export const sessionConfig: IronSessionOptions = {
   password: process.env.COOKIE_SECRET,
   cookieName: process.env.SCIX_SESSION_COOKIE_NAME,