The number frequently appears in technical performance logs, specifically in vmstat output for Linux systems, representing free memory (typically in kilobytes) at a specific point in time.
: In the specific trace where this number appears, it is analyzed alongside diskstats (disk I/O) and innodb transaction logs to see if memory pressure is causing threads to wait. Broader Context: Why Numbers Like This Matter 122064
: Seeing 122,064 KB free on a high-performance database server can be a warning sign. While Linux prefers to use "free" RAM for caching, a sudden drop toward this level often precedes swap activity , which can drastically slow down database queries. The number frequently appears in technical performance logs,
When a tool like pt-stalk or pt-sift captures this value, it isn't just a random number; it's a diagnostic snapshot used to identify "blockers" or resource contention. While Linux prefers to use "free" RAM for
: Often, servers appear healthy because CPU usage is low, but metrics like "free memory" and "wait time" (the wa column in logs) tell the real story of a system struggling to keep up with I/O. Summary of Technical Attributes Data Source vmstat / pt-sift Standard Linux performance reporting tools. Unit Kilobytes (KB) Represents ~119.2 MiB of memory. Primary Use Troubleshooting