# Is hsperfdata file critical? **URL:** \ **Category:** Elasticsearch\ **Created:** [March 16, 2016, 4:06pm UTC](https://discuss.elastic.co/t/is-hsperfdata-file-critical/44586 "2016-03-16T16:06:09Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\ **Post date:** [March 21, 2016, 8:02am UTC](https://discuss.elastic.co/t/is-hsperfdata-file-critical/44586/3 "2016-03-21T08:02:00Z")
Hey, I am confused, how can `df` show `/tmp` but is not in individual partition? Are you sure you did not add `/tmp` as a ramdisk? If so, 1 megabyte is really small. I just checked on an old Ubuntu LTS installation and that one looks fine. If you check the `/tmp` contents, then a file size of 32kb should not really be a problem compared to the initramfs size of the other file, buts lets leave it as is. The `hsperfdata` file is needed for tools like jstat to do some analysis and regurlarly updated by the JVM. A couple of workarounds: - Change the `java.io.tmpdir` path via a system property and point it to another directory without space issues - Disable gathering those stats via a JVM option called `-XX:-UsePerfData` - There is another option mentioned in this [lengthy but awesome blog post](http://www.evanjones.ca/jvm-mmap-pause.html), how this feature turned out to be a performance issue, you should take the time to read it, it is really interesting - Have a bigger `/tmp` dir, as there might be a fair share of other applications trying to write into it and fail, which might lead to processes exiting, check your logfiles --Alex --- _[View the full topic](https://discuss.elastic.co/t/is-hsperfdata-file-critical/44586)._