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If you want an absolute limit, you should look up cgroups . Place the Ceph OSD server within a cgroup and limit the maximum memory it can use by setting the memory. limit_in_bytes parameter for the cgroup. memory.
How do I disable cache memory in Linux?
How to Clear Cache in Linux?
- Clear PageCache only. # sync; echo 1 > /proc/sys/vm/drop_caches.
- Clear dentries and inodes. # sync; echo 2 > /proc/sys/vm/drop_caches.
- Clear pagecache, dentries, and inodes.
How do I reduce cache usage?
Lowering Memory Usage
- Use a smaller memory cache. Memory cache can be adjusted using the CACHESIZE environment variable. …
- Enable disk cache. …
- Avoid mounting multiple filesystems on a small machine. …
- Enable compaction. …
- Enable swap space on the local SSD. …
- Enable mboost for larger filesystems. …
- For read-only servers. …
- Other options.
