|
On any serious operating system, accessing the same content will be memory-mapped after the first request, since from then on the file(s) in question will be cached.
Reducing the complexity inside apache may even give a benefit.
Kurt Bremser
AMOS Austria
Newton was wrong. There is no gravity. The Earth sucks.
Von: Rose, John B [jbrose@xxxxxxx] Gesendet: Freitag, 11. September 2015 22:28 An: users@xxxxxxxxxxxxxxxx Betreff: **SPAM?** Memory mapping in Apache question [wd-vc] Apache 2.2
Prefork
Red Hat 6
We did a small test with a single image to compare results of it as memory mapped content and not memory mapped. I expected the memory mapped image to be quicker to load. But in our testing that did not seem to be the case. Should accessing a memory mapped
image be quicker than non-memory mapped?
I'm doing the below ab test to compare the performance, each 3 times:
ab -n 100000 -c 20 http://abc.com/
If we disable MMAP, It takes 14.555 seconds, 12.775 seconds, 10.698 seconds. Average: 12.675s.
It takes 18.468 seconds, 13.882 seconds, 16.532 seconds
Average: 16.294s. Thanks
AMOS Austria GmbH 1130 Wien, Hietzinger Kai 101-105 FN 365014k, Handelsgericht Wien UID: ATU 66614737 http://www.allianz.at ******************************************************** Dieses E-Mail und allfaellig daran angeschlossene Anhaenge enthalten Informationen, die vertraulich und ausschliesslich fuer den (die) bezeichneten Adressaten bestimmt sind. Wenn Sie nicht der genannte Adressat sind, darf dieses E-Mail samt allfaelliger Anhaenge von Ihnen weder anderen Personen zugaenglich gemacht noch in anderer Weise verwertet werden. Wenn Sie nicht der beabsichtigte Empfaenger sind, bitten wir Sie, dieses E-Mail und saemtliche angeschlossene Anhaenge zu loeschen. Please note: This email and any files transmitted with it is intended only for the named recipients and may contain confidential and/or privileged information. If you are not the intended recipient, please do not read, copy, use or disclose the contents of this communication to others and notify the sender immediately. Then please delete the email and any copies of it. Thank you. ******************************************************** |
|