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Old 06-17-2002
Memory problem


I have a server with a very little memory leak (29 bytes) as reported by Purify.
Itīs a pooled server, so each process lives forever accepting conections.But top or ps commands show that used memory it is always increasing much more than 29 bytes (30K mor or less) in each conection.
How can this be if Purify reports such a little memory leak?

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ovs-brcompatd(8)						Open vSwitch Manual						  ovs-brcompatd(8)

ovs-brcompatd - Bridge compatibility front-end for ovs-vswitchd SYNOPSIS
ovs-brcompatd [options] DESCRIPTION
A daemon that provides a legacy bridge front-end for ovs-vswitchd. It does this by listening for bridge ioctl commands (e.g., those gener- ated by the brctl program) to add or remove datapaths and the interfaces that attach to them. OPTIONS
--appctl=program Sets the name to the program that ovs-brcompatd runs to communicate with ovs-vswitchd. The default is ovs-appctl. Unless program contains /, ovs-brcompatd will search the PATH environment variable to find it. --vsctl=program Sets the name to the program that ovs-brcompatd runs to communicate with ovsdb-server. The default is ovs-vsctl. Unless program contains /, ovs-brcompatd will search the PATH environment variable to find it. --pidfile[=pidfile] Causes a file (by default, to be created indicating the PID of the running process. If the pidfile argument is not specified, or if it does not begin with /, then it is created in /var/run/openvswitch. If --pidfile is not specified, no pidfile is created. --overwrite-pidfile By default, when --pidfile is specified and the specified pidfile already exists and is locked by a running process, ovs-brcompatd refuses to start. Specify --overwrite-pidfile to cause it to instead overwrite the pidfile. When --pidfile is not specified, this option has no effect. --detach Causes ovs-brcompatd to detach itself from the foreground session and run as a background process. --monitor Creates an additional process to monitor the ovs-brcompatd daemon. If the daemon dies due to a signal that indicates a programming error (e.g. SIGSEGV, SIGABRT), then the monitor process starts a new copy of it. If the daemon die or exits for another reason, the monitor process exits. This option is normally used with --detach, but it also functions without it. --no-chdir By default, when --detach is specified, ovs-brcompatd changes its current working directory to the root directory after it detaches. Otherwise, invoking ovs-brcompatd from a carelessly chosen directory would prevent the administrator from unmounting the file system that holds that directory. Specifying --no-chdir suppresses this behavior, preventing ovs-brcompatd from changing its current working directory. This may be useful for collecting core files, since it is common behavior to write core dumps into the current working directory and the root directory is not a good directory to use. This option has no effect when --detach is not specified. -vmodule[:facility[:level]], --verbose=module[:facility[:level]] Sets the logging level for module in facility to level: o module may be any valid module name (as displayed by the --list action on ovs-appctl(8)), or the special name ANY to set the logging levels for all modules. o facility may be syslog, console, or file to set the levels for logging to the system log, the console, or a file respec- tively, or ANY to set the logging levels for both facilities. If it is omitted, facility defaults to ANY. Regardless of the log levels set for file, logging to a file will not take place unless --log-file is also specified (see below). o level must be one of off, emer, err, warn, info, or dbg, designating the minimum severity of a message for it to be logged. If it is omitted, level defaults to dbg. See ovs-appctl(8) for a definition of each log level. -v, --verbose Sets the maximum logging verbosity level, equivalent to --verbose=ANY:ANY:dbg. -vPATTERN:facility:pattern, --verbose=PATTERN:facility:pattern Sets the log pattern for facility to pattern. Refer to ovs-appctl(8) for a description of the valid syntax for pattern. --log-file[=file] Enables logging to a file. If file is specified, then it is used as the exact name for the log file. The default log file name used if file is omitted is /var/log/openvswitch/ovs-brcompatd.log. -h, --help Prints a brief help message to the console. -V, --version Prints version information to the console. --check-leaks=file Logs information about memory allocation and deallocation to file, to allow for debugging memory leaks in ovs-brcompatd. This option slows down ovs-brcompatd considerably, so it should only be used when a memory leak is suspected. Use the ovs-parse-leaks script to interpret the leak file. --leak-limit=size Limits size of the leak file as specified by --check-leaks to size bytes. Finding leaks sometimes requires allowing the leak file to grow very large, up to 1GB. By default, files are limited to 10MB. NOTES
ovs-brcompatd requires the brcompat_mod.ko kernel module to be loaded. SEE ALSO
ovs-appctl(8), ovs-vsctl(8), ovs-vswitchd(8), ovsdb-server(1), INSTALL.bridge in the Open vSwitch distribution. Open vSwitch March 2009 ovs-brcompatd(8)

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