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Published Date: June 5, 2013
Updated Date: February 21, 2023
This article applies to WebAccelerator version 9.x/10.x. For information about other versions, refer to the following article:
When the BIG-IP system is licensed with BIG-IP WebAccelerator, it runs an additional set of processes on top of the standard set of BIG-IP processes. The following table lists the core BIG-IP WebAccelerator processes, and indicates the impact to the BIG-IP WebAccelerator operation if the process is not running:
| Overview of BIG-IP WebAccelerator Daemons (9.x – 10.x) | |||
|---|---|---|---|
| Daemon | Description | Impact if not running | Relevant log files |
| pvac | The pvac process performs all of the web acceleration according to the policy specified in the application configuration. It processes client requests from TMM, communicates with origin web servers, caches objects in the Smart Cache, and performs content assembly functions such as IBR and MultiConnect. | The system will not process traffic. | /var/log/wa/pvac.log |
| comm_srv |
The comm_srv process is the configuration management communications server. It:
The pvac process connects to comm_srv on TCP port 12001. In symmetric deployments, all pvac processes communicate with the central comm_srv for config changes. |
No configuration is available to the pvac process. The system will not process traffic. | /var/log/wa/comm_srv.log |
| hds_prune | The hds_prune process monitors disk space on the cache partition and prunes it when 80% full. See K9079 for more info. | System performance will be affected when disk cache is full. | /var/log/wa/hds_prune.log |
| waicd | The waicd iControl daemon uses messages to sync invalidations between WebAccelerators in symmetric deployments. Listens on TCP port 12012. | Invalidations are not in sync. | None |
| mysqld |
The MySQL database stores:
|
No configuration is available to pvac. No performance report is generated. | /var/lib/mysql/mysqld.err |
| tomcat |
This tomcat context handles the WebAccelerator Configuration utility:
|
The Configuration utility does not function. |
9.4.x to 10.0.x: /var/log/tomcat4/catalina.out |
Starting and stopping BIG-IP WebAccelerator processes
You can use the command line to manage these processes. Use the following syntax with the bigstart command:
bigstart <action> <process>In this error message, note the following:
<action>is the operation: stop, start, or restart<process>is the WebAccelerator process name
For more on bigstart, see the man page or K4080.