David Boreham wrote: > Roman RATHLER wrote: >> If I activate error logging for ACL Control Summary or similar, the >> machine totaly goes into IO-Wait. It just writes maybe 100K/second >> but is totaly unusable any more... From normal 1% CPU Load (on a 2 >> Way Xeon) it moves to 200% CPU Utilization. >> Debugging ACLs therefore is nearly impossible on a productive system... >> >> We run the Fedora-DS 1.0.4 (fedora-ds-1.0.4-1.RHEL4) on an up2date >> CentOS System... Is there any perfomance tuning option like with the >> log-buffering for access log. I can't see, why logging kills the >> machine! > Errors often occur before a crash, and therefore the error log > is flushed to persistent store often in order to improve the chances > that any message emitted before a crash will be retained. > > I seem to remember that buffering can be enabled on the error log > but I can't remember the details. Probably in the documentation > somewhere though. > I think the underlying code is the same for the error log vs. the > access log > (which is optimized for performance by default) , so it should be > possible > to configure the error log to buffer. I don't think this is possible. It looks like only the access log has this switch. > > Alternatively you could put the error log file on a ramdisk. Another option is to replace the error log file with a named pipe. The other end of the pipe is connected to a python script that keeps a circular log buffer in memory. The script below allows you to configure the size of that buffer, and if you want to use a fifo for the access and audit logs. > > > -- > Fedora-directory-users mailing list > Fedora-directory-users at redhat.com > https://www.redhat.com/mailman/listinfo/fedora-directory-users -------------- next part -------------- A non-text attachment was scrubbed... Name: logmon.py Type: text/x-python Size: 5959 bytes Desc: not available Url : http://lists.fedoraproject.org/pipermail/389-users/attachments/20071009/d175abea/attachment.py -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 3245 bytes Desc: S/MIME Cryptographic Signature Url : http://lists.fedoraproject.org/pipermail/389-users/attachments/20071009/d175abea/attachment.bin
