diff --git a/admin/themes/default/js/maintenance.js b/admin/themes/default/js/maintenance.js
new file mode 100644
index 000000000..e7ab7ff5f
--- /dev/null
+++ b/admin/themes/default/js/maintenance.js
@@ -0,0 +1,52 @@
+function displayResponse(domElem, values, mDivs,  mValues) {
+
+    for (let index = 0; index < domElem.length; index++) {
+        domElem[index].html(values[index])
+    }
+
+    for (let index = 0; index < mDivs.length; index++) {
+        mDivs[index].title = mValues[index] + "Mo";
+        
+    }
+}
+
+$(document).ready(function () {
+    $(".refresh-cache-size").on("click", function test () {
+        $(this).children("span").addClass("spin6").removeClass("icon-arrows-cw")
+
+        return new Promise((res, rej) => {
+            jQuery.ajax({
+                url: "ws.php?format=json&method=pwg.getInfos",
+                type: "POST",
+                data: {
+                    param : "test_param",
+                    service : "test_service"
+                },
+                success: function (raw_data) {
+                    data = jQuery.parseJSON(raw_data);
+                    if (data.stat === "ok") {
+                        res();
+
+                        var domElemToRefresh = [$(".cache-size-value"), $(".multiple-pictures-sizes"), $(".multiple-compiledTemplate-sizes")];
+                        var multipleSizes = $(".delete-check-container").children(".delete-size-check");
+                        var domElemValues = [data.result.infos[3].value, 69, 42];
+                        var multipleSizesValues = [11, 10, 9, 8, 7, 6, 4, 3, 2, 1, 0]
+
+                        displayResponse(domElemToRefresh , domElemValues, multipleSizes,  multipleSizesValues);
+
+                        $(".refresh-icon").addClass("icon-arrows-cw").removeClass("spin6");
+
+                    } else {
+                        rej(raw_data);
+                    }
+                },
+                error: function(message) {
+                    rej(message);
+                }
+            });
+        })
+    })
+
+
+    
+})
\ No newline at end of file
diff --git a/admin/themes/default/template/maintenance_actions.tpl b/admin/themes/default/template/maintenance_actions.tpl
index f6216a240..e86e52b48 100644
--- a/admin/themes/default/template/maintenance_actions.tpl
+++ b/admin/themes/default/template/maintenance_actions.tpl
@@ -94,6 +94,9 @@ $(".delete-size-check").change(function() {
 })
 
 {/footer_script}
+
+{combine_script id='ajax' load='footer' path='admin/themes/default/js/maintenance.js'}
+
 <fieldset class="">
   <legend><span class="icon-globe icon-blue"></span>Global Gallery Actions</legend>
   <div style="display:flex;flex-wrap: wrap;">
@@ -130,7 +133,7 @@ $(".delete-size-check").change(function() {
       <span class="cache-size-value">999 Go</span>
       <span class="cache-lastCalculated-text">{'calculated'|@translate}</span>
       <span class="cache-lastCalculated-value">42 {'months ago'|@translate}</span>
-      <a><span class="icon-arrows-cw"></span>{'Refresh'|@translate}</a>
+      <a class="refresh-cache-size"><span class="refresh-icon icon-arrows-cw"></span>{'Refresh'|@translate}</a>
     </div>
     <a href="{$U_MAINT_COMPILED_TEMPLATES}" class="icon-doc maintenance-action">{'Purge compiled templates'|@translate} <span class="multiple-compiledTemplate-sizes"> 999 Go </span></a> 
   </div>
@@ -140,8 +143,8 @@ $(".delete-size-check").change(function() {
   <span id="label-delete-size-checkbox">{'Delete multiple size images'|@translate} <span class="multiple-pictures-sizes"> 999 Go </span></span>
     <div class="delete-check-container">
       {foreach from=$purge_derivatives key=name item=url name=loop}
-      <div class="delete-size-check" data-selected="0" name="{$url}">
-        <span class="select-checkbox"><i class="icon-ok" style="margin-left:8px"></i></span><span class="picture-deletion-size" title="Poids : 999Go" style="font-size:14px;margin-left:5px;padding-top:2px;">{$name}</span>
+      <div class="delete-size-check" title="Poids : 999Go" data-selected="0" name="{$url}">
+        <span class="select-checkbox"><i class="icon-ok" style="margin-left:8px"></i></span><span class="picture-deletion-size" style="font-size:14px;margin-left:5px;padding-top:2px;">{$name}</span>
       </div>
       {/foreach}
     </div>
@@ -195,4 +198,16 @@ $(".delete-size-check").change(function() {
   width:max-content;
   text-align:left;
 }
+
+.rotate-anim {
+  animation: spin 4s linear infinite;
+}
+
+@keyframes spin { 
+  100% { 
+    -webkit-transform: rotate(360deg);
+    transform:rotate(360deg); 
+  }
+}
+
 </style>
\ No newline at end of file
diff --git a/admin/themes/default/template/maintenance_env.tpl b/admin/themes/default/template/maintenance_env.tpl
index c59fe8945..f807ff063 100644
--- a/admin/themes/default/template/maintenance_env.tpl
+++ b/admin/themes/default/template/maintenance_env.tpl
@@ -1,3 +1,5 @@
+{combine_script id='ajax' load='footer' path='admin/themes/default/js/maintenance.js'}
+
 <fieldset id="environment">
   <legend><span class="icon-television icon-red"></span> {'Environment'|@translate}</legend>
   <ul style="font-weight:bold">
@@ -13,7 +15,7 @@
       <span class="cache-size-value">999 Go</span>
       <span class="cache-lastCalculated-text">{'calculated'|@translate}</span>
       <span class="cache-lastCalculated-value">{'42 months ago'|@translate}</span>
-      <a><span class="icon-arrows-cw"></span>{'Refresh'|@translate}</a>
+      <a class="refresh-cache-size"><span class="refresh-icon icon-arrows-cw"></span>{'Refresh'|@translate}</a>
     </li>
   </ul>
 </fieldset>
diff --git a/include/ws_functions/pwg.php b/include/ws_functions/pwg.php
index 6aeb36e60..669da4bbf 100644
--- a/include/ws_functions/pwg.php
+++ b/include/ws_functions/pwg.php
@@ -142,6 +142,10 @@ function ws_getInfos($params, &$service)
   $query = 'SELECT COUNT(*) FROM '.CATEGORIES_TABLE.';';
   list($infos['nb_categories']) = pwg_db_fetch_row(pwg_query($query));
 
+  // Cache size
+  // TODO for real later
+  $infos['cache_size'] = 4242;
+
   $query = 'SELECT COUNT(*) FROM '.CATEGORIES_TABLE.' WHERE dir IS NULL;';
   list($infos['nb_virtual']) = pwg_db_fetch_row(pwg_query($query));
 
@@ -187,7 +191,6 @@ function ws_getInfos($params, &$service)
       'value' => $value,
     );
   }
-
   return array('infos' => new PwgNamedArray($output, 'item'));
 }