eG Monitoring  

Measures reported by ApacheNewStatTest

This test reveals critical performance and uptime statistics pertaining to an Apache web server. This test, upon execution, accesses a specific URL on the Apache server, which contains the required metrics. Using this test, administrators can figure out how well the processes are being processed in the server, how many processes are currently idle, the processes that are in KEEPALIVE and Logging state etc. This way, this test helps administrators to identify processing bottlenecks, if any.

Outputs of the test : One set of results for the target Apache web server being monitored.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
serverUptime Indicates the total number of days that the server has been up since its last reboot. Days Administrators may wish to be alerted if a server has been running without a reboot for a very long period. Setting a threshold for this measure allows administrators to determine such conditions.
currUptime Indicates the time period that the server has been up since the last time this test ran. Seconds If the server has not been rebooted during the last measurement period and the agent has been running continuously, this value will be equal to the measurement period. If the server was rebooted during the last measurement period, this value will be less than the measurement period of the test. For example, if the measurement period is 300 secs, and if the server was rebooted 120 secs back, this metric will report a value of 120 seconds. The accuracy of this metric is dependent on the measurement period - the smaller the measurement period, greater the accuracy.
serRebooted Indicates whether the server has been rebooted during the last measurement period or not.   The values reported by this measure and its corresponding numeric values are mentioned in the table below:

Measure Value Numeric Value
No 0
Yes 1


Note:

By default, this measure reports the above-mentioned Measure Values to indicate whether the server has been rebooted or not. In the graph of this measure however, the Measure values are represented using the numeric equivalents only.



By checking the time periods when this metric changes from No to Yes, an administrator can determine the times when this server was rebooted. The Detailed Diagnosis of this measure, if enabled, lists the time, shutdown date, reboot date, shutdown duration, and reveals whether the server is in maintenance mode or not.
totalAccess Indicates the number of times the server was accessed by users during the last measurement period. Number  
totalTraffic Indicates the rate at which data is transmitted by the web server during the last measurement period. KB/Second  
cpuLoad Indicates the percentage of CPU utilized by the web server during the last measurement period. Percent If the value of this measure increases with time, it could be a cause for concern.
serReqPerSec Indicates the rate at which HTTP requests were processed by the web server during the last measurement period. Requests/second  
serKbyteSec Indicates the amount of data transferred by the web server per second during the last measurement period. KB/Second  
serKbyteReq Indicates the amount of data transferred by the web server per HTTP request during the last measurement period. KB/Requests  
currRequest Indicates the number of basic monitors consumed in the target environment.Indicates the number of HTTP requests that are currently being processed by the web server during the last measurement period. Number  
idleWorker Indicates the number of idle Apache processes waiting for an HTTP request during the last measurement period. Number  
totServer Indicates the total number of server instances i.e., threads on the web server during the last measurement period. Number A very high value of this measure could indicate a processing bottleneck.
waitConn Indicates the total number of threads that were waiting for a connection during the last measurement period. Number  
startUp Indicates the number of HTTP requests that were currently processed by the web server during the last measurement period. Number  
readRequest Indicates the number of HTTP requests that were reading the processes of the web server during the last measurement period. Number  
sendReply Indicates the number of HTTP requests that received response from the web server during the last measurement period. Number  
keepAlive Indicates the number of processes in KEEPALIVE state in the web server during the last measurement period. Number  
dnsLookup Indicates the number of requests for which DNS lookup state was enabled during the last measurement period. Number  
logging Indicates the number of processes that were in Logging state during the last measurement period. Number  
graceFinish Indicates the number of processes that were in gracefully finishing state during the last measurement period. Number Sometimes after a graceful restart of the Apache server, certain extra processes i.e., the child processes are left running on the server and these processes are deemed to be in gracefully finishing state. These processes remain in this state indefinitely and will not go away until a stop-and-start or a restart is issued on the server.

A low value is desired for this measure as frequent restarts to the server may gradually degrade the performance of the server.