VM Stats displays that majority memory is occupied by Cache
Historical Stats -> System Stats -> VM Stats displays that majority memory is occupied by Cache.
Cached memory has been used by Analytics process to momentarilly store query data in order to populate analytic charts. All Cached memory is eventually freed up by Cron job hourly; however, all Free memory is often occupied by Cached memory due to very large amount of query data populated per hour.
Please consider to run following commands via SSH console in order to change its Cron interval from 1H to 5min. Please be aware of that changing the Cron interval is harmless; it neither impacts your running traffic nor ruin active query data being processed by Analytics process.
Kernels 2.6.16 and newer provide a mechanism to have the kernel drop the page cache and/or inode and dentry caches on command, which can help free up a lot of memory. Now you can throw away that script that allocated a ton of memory just to get rid of the cache...
This is a non-destructive operation and will only free things that are completely unused. Dirty objects will continue to be in use until written out to disk and are not freeable. If you run "sync" first to flush them out to disk, these drop operations will tend to free more memory.
If you are experiencing issues with ScaleArc or with any of it's features, please contact ScaleArc Support. We are available 24x7 by phone at 855 800 7225 or +1 408 412 7315. For general support inquiries, you can also e-mail us at firstname.lastname@example.org.
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