diff --git a/collector/src/main/java/org/dromara/hertzbeat/collector/util/CollectUtil.java b/collector/src/main/java/org/dromara/hertzbeat/collector/util/CollectUtil.java
index dc2dc001dc7..be71bc1fc67 100644
--- a/collector/src/main/java/org/dromara/hertzbeat/collector/util/CollectUtil.java
+++ b/collector/src/main/java/org/dromara/hertzbeat/collector/util/CollectUtil.java
@@ -47,7 +47,7 @@ public class CollectUtil {
     private static final String CRYING_PLACEHOLDER_REX = "\\^o\\^";
     private static final String CRYING_PLACEHOLDER_REGEX = "(\\^o\\^)(\\w|-|$|\\.)+(\\^o\\^)";
     private static final Pattern CRYING_PLACEHOLDER_REGEX_PATTERN = Pattern.compile(CRYING_PLACEHOLDER_REGEX);
-    private static final List<String> UNIT_SYMBOLS = Arrays.asList("G", "g", "M", "m", "K", "k", "B", "b", "%");
+    private static final List<String> UNIT_SYMBOLS = Arrays.asList("%","G", "g", "M", "m", "K", "k", "B", "b");
 
     /**
      * 关键字匹配计数
@@ -89,16 +89,16 @@ public static DoubleAndUnit extractDoubleAndUnitFromStr(String str) {
             // B KB MB GB % ....
             for (String unitSymbol : UNIT_SYMBOLS) {
                 int index = str.indexOf(unitSymbol);
-                if (index > 0) {
-                    Double doubleValue = Double.parseDouble(str.substring(0, index));
-                    String unit = str.substring(index).trim();
+                if (index == 0) {
+                    Double doubleValue = 0d;
+                    String unit = str.trim();
                     doubleAndUnit.setValue(doubleValue);
                     doubleAndUnit.setUnit(unit);
                     return doubleAndUnit;
                 }
-                if (index == 0) {
-                    Double doubleValue = 0d;
-                    String unit = str.trim();
+                if (index > 0) {
+                    Double doubleValue = Double.parseDouble(str.substring(0, index));
+                    String unit = str.substring(index).trim();
                     doubleAndUnit.setValue(doubleValue);
                     doubleAndUnit.setUnit(unit);
                     return doubleAndUnit;
diff --git a/manager/src/main/resources/define/app-postgresql.yml b/manager/src/main/resources/define/app-postgresql.yml
index 56a030e8aee..5024112e06e 100644
--- a/manager/src/main/resources/define/app-postgresql.yml
+++ b/manager/src/main/resources/define/app-postgresql.yml
@@ -176,9 +176,6 @@ metrics:
     priority: 1
     fields:
       # 指标信息 包括 field名称   type字段类型:0-number数字,1-string字符串   instance是否为实例主键   unit:指标单位
-      - field: shared_buffers
-        type: 0
-        unit: MB
       - field: work_mem
         type: 0
         unit: MB