5.1.1 Resources used for deploying Web server and J2EE server on the same machine
This subsection describes the estimation of resources used for each OS when the Web server and J2EE server are deployed on the same machine.
Note that the Example of option settings in each table of estimation of resources used differs according to the OS and the kernel versions in use. Reference the manual of the OS being used and set up the estimates based on the estimation formula in the table. The settings are not required when the corresponding kernel parameter is not applicable in the OS being used.
- Organization of this subsection
(1) In AIX
The following table describes the estimation of resources used in AIX:
|
System resource |
Parameter |
Requirement |
Example of option settings |
|---|---|---|---|
|
Shared memory |
-- |
PrfTraceBufferSize#1 × 1,024 + 18,496 + maximum-number-of-concurrently- processed-requests#2 × 14 × 1,024 |
-- |
|
Number of processes |
-- |
maximum-number-of-concurrently-processed-requests#2 × 2 + 5 |
-- |
|
Number of threads |
-- |
maximum-number-of-concurrently- processed-requests#2 × 2 + 41 + number-of-J2EE-server-threads#3 |
-- |
|
Number of file descriptors |
nofiles |
number-of-J2EE-server-file-descriptors#3 + 76 + maximum-number-of-concurrently-processed- requests#2 × 4 |
/etc/security/limits |
- Legend:
-
--: Not applicable.
- #1
-
Specify the buffer memory size of performance tracer in the range of 512 kilobytes to 102,400 kilobytes. For details about PrfTraceBufferSize, see 4.12 Parameters applicable to logical performance tracers in the uCosminexus Application Server Definition Reference Guide.
- #2
-
Specify the maximum number of threads that can be processed concurrently in the Web server.
- #3
-
For calculating the number of threads and file descriptors of the J2EE server, see 5.2.1 Estimating the resources used by J2EE server.
(2) In Linux
The following table describes the estimation of resources used in Linux:
|
System resource |
Parameter |
Requirement |
Example of option settings |
|---|---|---|---|
|
Shared memory |
SHMMAX |
PrfTraceBufferSize#1 × 1,024 + 18,496 + maximum-number-of-concurrently- processed-requests#2 × 14 × 1,024 |
/proc/sys/kernel/shmmax |
|
Number of processes |
threads-max#3 |
maximum-number-of-concurrently-processed-requests#2 × 2 + 5 |
/proc/sys/kernel/threads-max |
|
Number of threads |
threads-max#3 |
maximum-number-of-concurrently-processed-requests#2 × 2 + 41 + number-of-J2EE-server- threads#4 |
-- |
|
Number of file descriptors |
fs.file-max |
number-of-J2EE-server-file-descriptors#4 + 76 + maximum-number-of- concurrently-processed-requests#2 × 4 |
/proc/sys/fs/file-max |
- Legend:
-
--: Not applicable.
- #1
-
Specify the buffer memory size of performance tracer in the range of 512 kilobytes to 102,400 kilobytes. For details about PrfTraceBufferSize, see 4.12 Parameters applicable to logical performance tracers in the uCosminexus Application Server Definition Reference Guide.
- #2
-
Specify the maximum number of requests that can be processed concurrently in the Web server.
- #3
-
Specify the total of number of processes and threads in the threads-max parameter.
- #4
-
For calculating the number of threads and file descriptors of the J2EE server, see 5.2.1 Estimating the resources used by J2EE server.