Hi all,
I'm currently having a lot of trouble debugging the memory usage of the
program I'm working on. This program, everyday at a given time, reloads a
bunch of data (that's been updated by another program) into its memory. The
following function:
// PrintMemUsage outputs the current, total and OS memory being used. As
well as the number
// of garage collection cycles completed.
func PrintMemUsage() {
var m runtime.MemStats
runtime.ReadMemStats(&m)
// For info on each, see: https://golang.org/pkg/runtime/#MemStats
fmt.Printf("Alloc = %v MiB", bToMb(m.Alloc))
fmt.Printf("TotalAlloc = %v MiB", bToMb(m.TotalAlloc))
fmt.Printf("Sys = %v MiB", bToMb(m.Sys))
fmt.Printf("NumGC = %v\n", m.NumGC)
}
Outputs this:
Alloc = 103861 MiB
TotalAlloc = 6634355 MiB
Sys = 232088 MiB
NumGC = 3822
The program reloads its data everyday but everyday the few references that
existed for the given data is overwritten by the new one. And indeed the
"Alloc" line above seems to stay around 100GB. Where I don't understand
what happens is that in the htop line of the program, the memory that is
used by the program keeps growing as the days pass, and when it reaches
close to 100% percent of the host's memory, the program will crash
eventually.
Any idea that would help me debug this memory inconstency between memstats
and htop is welcome. I can also provide more information but no particular
piece of code directly from the project.
Thank you all in advance.
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