A VPS I'm using has become unbearably slow. Over ssh, things like changing directories or opening small files take 5+ seconds to complete. The website hosted on it, however, performs with reasonable latency as long as it doesn't read too more than a couple KB from the DB.
cat /proc/meminfo. I'm not a sys admin, but this looks suspicious to me. Especially Active/Inactive being 0. Does this mean it's not buffering any disk reads? So, does this (partially?) explain the performance problems? Is there a straightforward way to fix this (I have root access, but no access to the hosting provider's control panel).
EDIT: CPU utilization is about zero most of the time and doesn't seem to affect the issues I'm having.
MemTotal: 4190208 kB MemFree: 3970416 kB Buffers: 0 kB Cached: 0 kB SwapCached: 0 kB Active: 0 kB Inactive: 0 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 4190208 kB LowFree: 3970416 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 0 kB Mapped: 219792 kB Slab: 0 kB PageTables: 0 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 0 kB Committed_AS: 1243020 kB VmallocTotal: 0 kB VmallocUsed: 0 kB VmallocChunk: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 Hugepagesize: 2048 kB