DO NOT REPLY [Bug 15651] New: - Apache is Very slow during peak

From: <bugzilla(at)apache.org>
Date: Tue Dec 24 2002 - 09:11:32 EST

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Apache is Very slow during peak

           Summary: Apache is Very slow during peak
           Product: Apache httpd-1.3
           Version: 1.3.27
          Platform: Sun
        OS/Version: Other
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Other mods
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: rajeshb@sapient.com

We are using Tomcat 3.3.1 with Apache 1.3.27 in Solaris 2.8 ( 4 CPU, 4GB RAM ).

• Under heavy loads, sometimes apache stops processing the requests. At this time, we don't see anything in the access logs. So it is not even accepting the requests.
• We do NOT have much sockets in TIME_WAIT mode. Its around 400 at peaktime. So its not because of these sockets in TIME_WAIT state. We have tcp_time_Wait_interval to 60000 which is good enough.
• We have set the MaxClients to 100 and there are about 70-80 child httpd process at peak time. Rarely in error_log, we find "MaxClients reached". This means its queueing the requests. But this happens rarely.
• Is it a bug in 1.3.27. We were using 1.3.20 previously. We did not face this problem before.
• The problem seems to be there for a while, and apache returns to normal operation after 10 or 15 minutes. But for this 10-15 minutes, it is not even serving a single request.
• We don;t see any CPU usage, iowait, kernel usage or other abnormal things happening at this point.
• Could anyone have a look at it. It would be of great help.

regards
Rajesh.B

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