# Monitoring urcap memory usage

**URL:** <https://forum.universal-robots.com/t/monitoring-urcap-memory-usage/3761>\
**Category:** URCap Development\
**Tags:** memory-error\
**Created:** [March 4, 2019, 10:47am UTC](https://forum.universal-robots.com/t/monitoring-urcap-memory-usage/3761 "2019-03-04T10:47:16Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![anon58840761](https://avatars.discourse-cdn.com/v4/letter/a/e9c0ed/32.png) [@anon58840761](https://forum.universal-robots.com/u/anon58840761)\
**Post date:** [March 4, 2019, 10:47am UTC](https://forum.universal-robots.com/t/monitoring-urcap-memory-usage/3761/1 "2019-03-04T10:47:16Z")

</div>

After a awhile have been getting this following error: “java.lang.OutOfMemoryError”: Java heap space, on a robot which have some URCaps,

I want to be able to detect which ones of URCaps are hogging all the memory from the robot, is there a way to monitor the memory usage of each URCap on the robot? I tried to use Htop, but it just shows one process java process, which doesn’t say alot.

---

<div class="post-metadata">

**Author:** ![sam.verity-hilton](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/sam.verity-hilton/32/6046_2.png) [@sam.verity-hilton](https://forum.universal-robots.com/u/sam.verity-hilton)\
**Post date:** [March 4, 2019, 10:52am UTC](https://forum.universal-robots.com/t/monitoring-urcap-memory-usage/3761/2 "2019-03-04T10:52:35Z")

</div>

Can you post a screenshot of the error?

---

<div class="post-metadata">

**Author:** ![anon58840761](https://avatars.discourse-cdn.com/v4/letter/a/e9c0ed/32.png) [@anon58840761](https://forum.universal-robots.com/u/anon58840761)\
**Post date:** [March 4, 2019, 11:13am UTC](https://forum.universal-robots.com/t/monitoring-urcap-memory-usage/3761/3 "2019-03-04T11:13:50Z")

</div>

Here, I have looked into the error and made some changes to the URCap, but it would be nice to monitor all URCaps since this error only show after a week or so and I think there could be more than one that is hogging memory.  
 ![IMG_2840](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/0/00262d101ba575b04191db233d67fe570dde98c4.jpeg)

---

<div class="post-metadata">

**Author:** ![anon99292792](https://avatars.discourse-cdn.com/v4/letter/a/8edcca/32.png) [@anon99292792](https://forum.universal-robots.com/u/anon99292792)\
**Post date:** [November 12, 2019, 6:50am UTC](https://forum.universal-robots.com/t/monitoring-urcap-memory-usage/3761/4 "2019-11-12T06:50:25Z")

</div>

Hello,  
im am having a similar problem. Did you managed to detect the source of it?

---

<div class="post-metadata">

**Author:** ![d.verhofstadt](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/d.verhofstadt/32/1466_2.png) [@d.verhofstadt](https://forum.universal-robots.com/u/d.verhofstadt)\
**Post date:** [July 27, 2022, 10:08am UTC](https://forum.universal-robots.com/t/monitoring-urcap-memory-usage/3761/5 "2022-07-27T10:08:11Z")

</div>

Hi

Is there a way to monitor the heap space usage of a URCap?