# \\xff\\0x02/blog range is heavily queried

**URL:** <https://forums.foundationdb.org/t/xff-0x02-blog-range-is-heavily-queried/4711>\
**Category:** Running FoundationDB\
**Created:** [November 26, 2024, 2:50am UTC](https://forums.foundationdb.org/t/xff-0x02-blog-range-is-heavily-queried/4711 "2024-11-26T02:50:21Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![mpatou\_openai](https://sea1.discourse-cdn.com/foundationdb/user_avatar/forums.foundationdb.org/mpatou_openai/32/1883_2.png) [@mpatou\_openai](https://forums.foundationdb.org/u/mpatou_openai)\
**Post date:** [November 26, 2024, 2:50am UTC](https://forums.foundationdb.org/t/xff-0x02-blog-range-is-heavily-queried/4711/1 "2024-11-26T02:50:21Z")

</div>

We noticed one of our cluster has a set of storage server that are running at very high CPU (\>90%) when the rest is somewhat normal.  
When I started to look I noticed that one of the hotrange was for the system key. I wrote a small script to read `\xff\xff/metrics/data_distribution_stats/` and found that this range:  
`b'\xff\x02/blog/\x93*\x18\t\xd9\xec\xc2NF\xfc\x899*\x95\\\xf8S\x00\x00\x07f\xc5'` has a shard\_bytes\_per\_second of 30224KB for a shard\_bytes of 2860KB.  
It’s the busiest shard in our database.  
I looked at this post: [Sum of key-value sizes seems incorrect](https://forums.foundationdb.org/t/sum-of-key-value-sizes-seems-incorrect/2829) and there is nothing outstanding in the output of `fdbbackup status` and `cleanup` only wants to remove things that are a few minutes old.

What could be the reason for a very large `blog` range ?