--- zabbix-4.4.8/src/zabbix_server/server.c	2020-04-27 18:15:30.000000000 +0800
+++ zabbix-4.4.8.new/src/zabbix_server/server.c	2020-05-15 07:49:39.065171275 +0800
@@ -657,11 +657,11 @@
 		{"CacheSize",			&CONFIG_CONF_CACHE_SIZE,		TYPE_UINT64,
 			PARM_OPT,	128 * ZBX_KIBIBYTE,	__UINT64_C(8) * ZBX_GIBIBYTE},
 		{"HistoryCacheSize",		&CONFIG_HISTORY_CACHE_SIZE,		TYPE_UINT64,
-			PARM_OPT,	128 * ZBX_KIBIBYTE,	__UINT64_C(2) * ZBX_GIBIBYTE},
+			PARM_OPT,	128 * ZBX_KIBIBYTE,	__UINT64_C(8) * ZBX_GIBIBYTE},
 		{"HistoryIndexCacheSize",	&CONFIG_HISTORY_INDEX_CACHE_SIZE,	TYPE_UINT64,
-			PARM_OPT,	128 * ZBX_KIBIBYTE,	__UINT64_C(2) * ZBX_GIBIBYTE},
+			PARM_OPT,	128 * ZBX_KIBIBYTE,	__UINT64_C(8) * ZBX_GIBIBYTE},
 		{"TrendCacheSize",		&CONFIG_TRENDS_CACHE_SIZE,		TYPE_UINT64,
-			PARM_OPT,	128 * ZBX_KIBIBYTE,	__UINT64_C(2) * ZBX_GIBIBYTE},
+			PARM_OPT,	128 * ZBX_KIBIBYTE,	__UINT64_C(8) * ZBX_GIBIBYTE},
 		{"ValueCacheSize",		&CONFIG_VALUE_CACHE_SIZE,		TYPE_UINT64,
 			PARM_OPT,	0,			__UINT64_C(64) * ZBX_GIBIBYTE},
 		{"CacheUpdateFrequency",	&CONFIG_CONFSYNCER_FREQUENCY,		TYPE_INT,