diff --git a/etc/cron.jobs.in b/etc/cron.jobs.in
index 7c6a5c7f..527ac697 100644
--- a/etc/cron.jobs.in
+++ b/etc/cron.jobs.in
@@ -7,7 +7,6 @@ piler's crontab:
 
 ### mandatory
 
-*/5  * * * * LC_ALL=C mpstat | tail -1 | awk '{print $11}' > /var/piler/stat/cpu.stat
 5,35 * * * * LIBEXECDIR/piler/indexer.delta.sh
 30   2 * * * LIBEXECDIR/piler/indexer.main.sh
 */15 * * * * /usr/local/bin/indexer --quiet tag1 --rotate
diff --git a/util/postinstall.sh.in b/util/postinstall.sh.in
index 324f77ce..4b787ce2 100755
--- a/util/postinstall.sh.in
+++ b/util/postinstall.sh.in
@@ -284,8 +284,6 @@ make_cron_entries() {
 
    echo ""
    echo "### PILERSTART" >> $CRON_TMP
-   echo "*/5 * * * * LC_ALL=C mpstat | tail -1 | awk '{print \$11}' > $LOCALSTATEDIR/piler/stat/cpu.stat" >> $CRON_TMP
-
    echo "5,35 * * * * $LIBEXECDIR/piler/indexer.delta.sh" >> $CRON_TMP
    echo "30   2 * * * $LIBEXECDIR/piler/indexer.main.sh" >> $CRON_TMP
    echo "*/15 * * * * $INDEXER --quiet tag1 --rotate" >> $CRON_TMP
diff --git a/webui/config.php b/webui/config.php
index 6aec2731..2302b864 100644
--- a/webui/config.php
+++ b/webui/config.php
@@ -193,6 +193,7 @@ $config['SPHINX_NOTE_INDEX'] = 'note1';
 
 $config['RELOAD_COMMAND'] = 'sudo -n /etc/init.d/rc.piler reload';
 $config['PILERIMPORT_IMAP_COMMAND'] = '/usr/local/bin/pilerimport -d /var/piler/imap -q -r';
+$config['CPU_USAGE_COMMAND'] = "LC_ALL=C mpstat | tail -1 | awk '{print $11}'";
 
 $config['LDAP_IMPORT_CONFIG_FILE'] = '/usr/local/etc/ldap-import.cfg';
 
diff --git a/webui/controller/health/worker.php b/webui/controller/health/worker.php
index 1a2e88eb..7491a75d 100644
--- a/webui/controller/health/worker.php
+++ b/webui/controller/health/worker.php
@@ -50,7 +50,8 @@ class ControllerHealthWorker extends Controller {
 
       list ($this->data['uptime'], $this->data['cpuload']) = $this->model_health_health->uptime();
 
-      $this->data['cpuinfo'] = 100 - (int)file_get_contents(CPUSTAT);
+      $x = system(CPU_USAGE_COMMAND);
+      $this->data['cpuinfo'] = 100 - (int)$x;
 
       $this->data['quarantinereportinfo'] = @file_get_contents(DAILY_QUARANTINE_REPORT_STAT);