There is no systemd on this platform. More details about the platform:
Description: Ubuntu 12.04.1 LTS Release: 12.04 Codename: precise Linux 3.13.0-39-generic #66-Ubuntu SMP On Fri, Nov 28, 2014 at 7:14 AM, Mehrdad Pazooki <[email protected]> wrote: > It's running in Ubuntu (precise). I'll check it for systemd. I think > syslog call is blocking because of /dev/log . if I use UDP locally, will > that bypass /Dev/log? > > > On Fri, Nov 28, 2014, 04:08 Rainer Gerhards <[email protected]> > wrote: > >> which platform is this running on? Is systemd journal active? >> >> Rainer >> >> 2014-11-27 22:37 GMT+01:00 Mehrdad Pazooki <[email protected]>: >> >> > Hi, >> > >> > I am calling syslog in c++ using syslog.h . the time it takes on each >> call >> > is too long. I am comparing it with IPC Queue and there is almost >> 100usec >> > overhead when I call syslog() vs ipc. >> > I did some benchmarking, when I use a single process for hitting syslog >> the >> > performance is great it stays at avg 11usec/record for 1m records on my >> > system. but if I run 10 of these processes the time will increase to >> about >> > 100usec/record. >> > >> > Another problem is that memory usage remains really low ~0% so that >> tells >> > me syslog() is somehow blocking and using cpu rather than do a set an >> > forget to the queue and process it later on. another issue is that all >> > workers are not engage. I see 5 workers but only 3 are working. >> > The way I'm using it in prod is about 500 threads hit syslog(). I need >> to >> > keep the time it takes for a syslog() call to a constant of 10usec >> ideal to >> > max 40usec. >> > Also, I am not doing openlog() before calling syslog() >> > >> > This is my configuration: >> > >> > # /etc/rsyslog.conf Configuration file for rsyslog. >> > # >> > # For more information see >> > # /usr/share/doc/rsyslog-doc/ >> > html/rsyslog_conf.html >> > # >> > # Default logging rules can be found in /etc/rsyslog.d/50-default.conf >> > >> > >> > ################# >> > #### MODULES #### >> > ################# >> > $ModLoad imuxsock # provides support for local system logging >> > $ModLoad imklog # provides kernel logging support (previously done by >> > rklogd) >> > #$ModLoad immark # provides --MARK-- message capability >> > >> > # provides UDP syslog reception >> > #$ModLoad imudp >> > #$UDPServerRun 514 >> > >> > # provides TCP syslog reception >> > #$ModLoad imtcp >> > #$InputTCPServerRun 514 >> > >> > >> > # For debug only >> > # module(load="impstats" interval="1" severity="8") >> > >> > ########################### >> > #### GLOBAL DIRECTIVES #### >> > ########################### >> > >> > # >> > # Use traditional timestamp format. >> > # To enable high precision timestamps, comment out the following line. >> > # >> > $ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat >> > >> > # Filter duplicated messages >> > $RepeatedMsgReduction off >> > >> > # >> > # Set the default permissions for all log files. >> > # >> > $FileOwner root >> > $FileGroup adm >> > $FileCreateMode 0640 >> > $DirCreateMode 0755 >> > $Umask 0022 >> > $PrivDropToUser root >> > $PrivDropToGroup root >> > >> > # >> > # Where to place spool files >> > # >> > $WorkDirectory /var/spool/rsyslog >> > >> > $ActionResumeRetryCount -1 # infinite >> retries if >> > host is down >> > $SystemLogRateLimitInterval 0 >> > $SystemLogRateLimitBurst 0 >> > $MaxMessageSize 4k >> > >> > main_queue( >> > queue.Type="LinkedList" >> > queue.Size="1000000" >> > queue.workerThreads="8" >> > queue.workerThreadMinimumMessages="10000" >> > queue.SaveOnShutdown="on" >> > ) >> > >> > >> > >> > template(name="localone" type="string" string="%msg:2:$%\n") # ":2:$" >> --> >> > tells rsyslog to ignore the leading char, b/c rsyslog adds a leading >> space >> > to every message >> > >> > if $syslogfacility-text == 'local1' then { >> > action( >> > type="omfile" >> > template="localone" >> > file="/var/log/local1.log" >> > flushOnTXEnd="off" >> > asyncWriting="on" >> > ioBufferSize="64k" >> > queue.type="LinkedList" >> > queue.size="1000000" >> > queue.dequeueBatchSize="4096" >> > queue.workerThreads="8" >> > queue.workerThreadMinimumMessages="10000" >> > queue.SaveOnShutdown="on" >> > action.ResumeRetryCount="-1" >> > ) >> > stop >> > } >> > >> > #if $syslogtag contains 'rsyslogd-pstats' then { >> > # action( >> > # type="omfile" >> > # queue.type="LinkedList" >> > # queue.discardmark="1000" >> > # name="pstats" >> > # file="/var/log/pstats.log" >> > # ) >> > # stop >> > #} >> > _______________________________________________ >> > rsyslog mailing list >> > http://lists.adiscon.net/mailman/listinfo/rsyslog >> > http://www.rsyslog.com/professional-services/ >> > What's up with rsyslog? Follow https://twitter.com/rgerhards >> > NOTE WELL: This is a PUBLIC mailing list, posts are ARCHIVED by a myriad >> > of sites beyond our control. PLEASE UNSUBSCRIBE and DO NOT POST if you >> > DON'T LIKE THAT. >> > >> _______________________________________________ >> rsyslog mailing list >> http://lists.adiscon.net/mailman/listinfo/rsyslog >> http://www.rsyslog.com/professional-services/ >> What's up with rsyslog? Follow https://twitter.com/rgerhards >> NOTE WELL: This is a PUBLIC mailing list, posts are ARCHIVED by a myriad >> of sites beyond our control. PLEASE UNSUBSCRIBE and DO NOT POST if you >> DON'T LIKE THAT. >> > _______________________________________________ rsyslog mailing list http://lists.adiscon.net/mailman/listinfo/rsyslog http://www.rsyslog.com/professional-services/ What's up with rsyslog? Follow https://twitter.com/rgerhards NOTE WELL: This is a PUBLIC mailing list, posts are ARCHIVED by a myriad of sites beyond our control. PLEASE UNSUBSCRIBE and DO NOT POST if you DON'T LIKE THAT.
