--- zabbix-4.4.8/src/zabbix_proxy/proxy.c	2020-04-27 18:15:30.000000000 +0800
+++ zabbix-4.4.8.new/src/zabbix_proxy/proxy.c	2020-05-15 07:46:31.464752838 +0800
@@ -671,9 +671,9 @@
 		{"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},
 		{"HousekeepingFrequency",	&CONFIG_HOUSEKEEPING_FREQUENCY,		TYPE_INT,
 			PARM_OPT,	0,			24},
 		{"ProxyLocalBuffer",		&CONFIG_PROXY_LOCAL_BUFFER,		TYPE_INT,