# 12 Upgrade notes for 2.2.4

**Latest data from 24 hours only**

Only values that fall within the last 24 hours are now displayed in
*Monitoring* → *Latest data*, *Monitoring* → *Overview* and the *Data
overview* screen element by default.

This limit has been introduced with the aim of improving initial loading
times for large pages of latest data. It is also possible to change this
limitation by changing the value of ZBX\_HISTORY\_PERIOD
[constant](/manual/web_interface/definitions) in
*include/defines.inc.php*.

Note also that the {ITEM.LASTVALUE} macro may resolve to *UNKNOWN* if
the last value of item is older than the default 24 hour limit.

**Fixed *Template App Zabbix Proxy* template**

Item *Values processed by Zabbix proxy* has been renamed to *Values
processed by Zabbix proxy per second* to match server template.

Graph *Zabbix proxy performance* had the same y axis side for all items.
The queue item has been changed from left to right to match server
template and separate unrelated items. In order to fix it, import this
template from
<https://www.zabbix.org/wiki/Zabbix_Templates/Official_Templates>.

**Changes in *Memory usage* graphs**

All operating system template *Memory usage* graphs now have their Y
axis minimum value set to 0 and Y axis maximum value to the maximum
amount of memory detected on the system. To update your existing
template(s), import the appropriate OS template(s) from the 2.2.4
section of the [Official
Templates](https://www.zabbix.org/wiki/Zabbix_Templates/Official_Templates)
page.

**Daemon changes**

Disabled hosts, items and triggers are stored in configuration cache
now. Adjusting **CacheSize** configuration parameter might be needed due
to increased memory usage.

Information about hosts going in and out of maintenance is no longer
logged at DebugLevel=3. Instead, it is now logged at DebugLevel=4.

**Calculation of active triggers**

Previously, the *Status of Zabbix* dashboard widget in the frontend
counted enabled triggers with at least one enabled item on an enabled
host. Now, it counts enabled triggers with all items enabled on enabled
hosts.

The **zabbix\[triggers\]** internal item has undergone the same change.