Hi team we have seen this issue where CN consistently failed StarRocks #questions-and-troubleshooting

Hi team, we have seen this issue where CN consiste...

Tiasnu

10/10/2025, 11:35 AM

Hi team, we have seen this issue where CN consistently failed to write cache

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W20251010 11:30:08.007740 140027330561600 cache_file.h:130] write star cache file data/07b82c61-baf8-4acb-9f6c-6b3669e414a6.sst failed, errmsg: INTERNAL: fail to write block because no valid cache space

but inside the CN nodes, I can see clearly there is plenty of space for cache to write

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Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme1n1     98G   51M   98G   1% /opt/starrocks/be/storage

Could you help to see what might be the issue here?

Kevin Cai

10/10/2025, 11:45 AM

the disk space is too small, diskcache will skip use this disk.

Tiasnu

10/10/2025, 11:52 AM

What do you mean the disk space is too small? We have 100G allocated, and you can see the /storage path is mounted correctly with only 1% used

Tiasnu

10/10/2025, 11:54 AM

datacache with cache size also have been specified

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datacache_enable = true
starlet_star_cache_disk_size_percent = 80
datacache_disk_size = 80%

Tiasnu

10/10/2025, 1:05 PM

@Kevin Cai also I could not find

cache_file.h

in starrocks repo, I guess this is the part where only binary is OSS atm? So currently I cannot dig into source code and debut this myself

Kevin Cai

10/10/2025, 1:09 PM

which SR version are you on?

Darcy Xu

10/11/2025, 2:04 AM

datacache_min_disk_quota_for_adjustment, change this to 10737418240, default is 100G, if disk is below 100G, disk cache will be skipped, change this to 10G, so you can use disk cache

Tiasnu

10/13/2025, 7:46 AM

starrocks 4.0 rc1

Open in Slack

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