mirror of
https://github.com/apache/httpd.git
synced 2026-01-06 09:01:14 +03:00
a369776b21
The root cause is a too small idle timeout (600 microseconds).
Add a new directive, 'MemcacheConnTTL', to control this idle connection timeout with the memcache server(s).
Change the default value from 600 usec (!) to 15 sec as per Yann suggestion.
I've limited accepted values from 1 to 1800 seconds (half an hour) because internaly, the value passed to 'apr_memcache_server_create' is still in mirco-seconds.
PR 58091
~~~~~~~~~~~~~~~~~~~_
Homemade measurement (on a slighly modified version of httpd) shows a +30% in number of processed requests using memcache to cache /index.html.
Comparison made between the 600 usec and 15 sec TTL.
Memcache config:
default
httpd Config:
CacheEnable socache /
CacheSocache memcache:127.0.0.1
LoadModule mpm_event_module modules/mod_mpm_event.so
httpd compiled with:
./configure --enable-mpms-shared=all --with-included-apr --with-mysql --with-libxml2 --enable-modules=reallyall --enable-ssl-ct=no --enable-maintainer-mode --prefix=$HOME/httpd-2.5
httpd and memcache running on the same VM running under Ubuntu 15.04
Load tested using:
ab -n 20000 http://127.0.0.1/index.html
Creation/closing of connections beetween httpd and memcache confirmed using the telnet connection to memcache and the stats command
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1696105 13f79535-47bb-0310-9956-ffa450edef68
Apache HTTP Server
What is it?
-----------
The Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant
web server. Originally designed as a replacement for the NCSA HTTP
Server, it has grown to be the most popular web server on the
Internet. As a project of the Apache Software Foundation, the
developers aim to collaboratively develop and maintain a robust,
commercial-grade, standards-based server with freely available
source code.
The Latest Version
------------------
Details of the latest version can be found on the Apache HTTP
server project page under http://httpd.apache.org/.
Documentation
-------------
The documentation available as of the date of this release is
included in HTML format in the docs/manual/ directory. The most
up-to-date documentation can be found at
http://httpd.apache.org/docs/trunk/.
Installation
------------
Please see the file called INSTALL. Platform specific notes can be
found in README.platforms.
Licensing
---------
Please see the file called LICENSE.
Cryptographic Software Notice
-----------------------------
This distribution may include software that has been designed for use
with cryptographic software. The country in which you currently reside
may have restrictions on the import, possession, use, and/or re-export
to another country, of encryption software. BEFORE using any encryption
software, please check your country's laws, regulations and policies
concerning the import, possession, or use, and re-export of encryption
software, to see if this is permitted. See <http://www.wassenaar.org/>
for more information.
The U.S. Government Department of Commerce, Bureau of Industry and
Security (BIS), has classified this software as Export Commodity
Control Number (ECCN) 5D002.C.1, which includes information security
software using or performing cryptographic functions with asymmetric
algorithms. The form and manner of this Apache Software Foundation
distribution makes it eligible for export under the License Exception
ENC Technology Software Unrestricted (TSU) exception (see the BIS
Export Administration Regulations, Section 740.13) for both object
code and source code.
The following provides more details on the included files that
may be subject to export controls on cryptographic software:
Apache httpd 2.0 and later versions include the mod_ssl module under
modules/ssl/
for configuring and listening to connections over SSL encrypted
network sockets by performing calls to a general-purpose encryption
library, such as OpenSSL or the operating system's platform-specific
SSL facilities.
In addition, some versions of apr-util provide an abstract interface
for symmetrical cryptographic functions that make use of a
general-purpose encryption library, such as OpenSSL, NSS, or the
operating system's platform-specific facilities. This interface is
known as the apr_crypto interface, with implementation beneath the
/crypto directory. The apr_crypto interface is used by the
mod_session_crypto module available under
modules/session
for optional encryption of session information.
Some object code distributions of Apache httpd, indicated with the
word "crypto" in the package name, may include object code for the
OpenSSL encryption library as distributed in open source form from
<http://www.openssl.org/source/>.
The above files are optional and may be removed if the cryptographic
functionality is not desired or needs to be excluded from redistribution.
Distribution packages of Apache httpd that include the word "nossl"
in the package name have been created without the above files and are
therefore not subject to this notice.
Contacts
--------
o If you want to be informed about new code releases, bug fixes,
security fixes, general news and information about the Apache server
subscribe to the apache-announce mailing list as described under
<http://httpd.apache.org/lists.html#http-announce>
o If you want freely available support for running Apache please see the
resources at <http://httpd.apache.org/support.html>
o If you have a concrete bug report for Apache please see the instructions
for bug reporting at <http://httpd.apache.org/bug_report.html>
o If you want to participate in actively developing Apache please
subscribe to the `dev@httpd.apache.org' mailing list as described at
<http://httpd.apache.org/lists.html#http-dev>