A function to calculate the percent of requests that were "refused" by Apache server due to the clients ability to read the file from their cache instead.
Python, 14 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 | def ClientCachePercentage(logfile_pathname):
Contents = open(logfile_pathname, "r").readlines()
TotalRequests = len(Contents)
CachedRequests = 0
for line in Contents:
if line.split(" ")[8] == "304": # if server returned "not modified"
CachedRequests += 1
return TotalRequests / CachedRequests
# example usage
log_path = "/usr/local/nusphere/apache/logs/access_log"
print "Percentage of requests that are client-cached: " + str(ClientCachePercentage(log_path)) + "%"
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This can be useful in performance analysis. The percentage of requests for cached files versus non-cached files can have a great bearing on the perceived performance of your server.
Tags: sysadmin
