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@madmaze
Last active Aug 29, 2015
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Quick and Dirty Python Memory and Swap usage Logger
#!/usr/bin/env python
import os
import datetime
import psutil
# This script will dump the memory state and write it to mem.log
# if more than 2880 entries are in the log file, it will start removing
# old ones in order to keep the log size down.
#
# To use this script first install psutil: sudo pip install psutil
# then run: crontab -e
# add this line to the bottom(adjust the path to where the script is):
# * * * * * cd /home/madmaze/trash; /usr/bin/python /home/madmaze/trash/memoryLogger.py
#
# This will write add a new entry to mem.log every minute and keep 48hrs of records
def getUsage():
m=psutil.virtual_memory()
s=psutil.swap_memory()
memkeys=["total", "available", "percent", "used", "free", "active", "inactive", "buffers", "cached"]
swapkeys=["total", "used", "free", "perc","sin","sout"]
info={}
# MEM
for n,k in enumerate(m):
if memkeys[n] not in ["percent","active","inactive"]:
info["mem_"+memkeys[n]]=str(k/1024/1024)+" MB"
# SWAP
for n,k in enumerate(s):
if n < 3:
info["swap_"+memkeys[n]]=str(k/1024/1024)+" MB"
return info
logfile="mem.log"
f_in=open(logfile,"r")
lines=f_in.readlines()
f_in.close()
totalLen=len(lines)
maxlen=2*24*60 # 2days * 24hr * 60m
if totalLen > maxlen+100:
# Crop file to length
f_out=open(logfile,"w")
for n,l in enumerate(lines):
if (totalLen-n)<maxlen:
f_out.write(l)
else:
# just append
f_out=open(logfile,"a")
# Actually append the next line of data
f_out.write(str(datetime.datetime.now())+" "+str(getUsage())+"\n")
f_out.close()
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