BEA Tuxedo管理手册
Servers with Reply Queues) - (No. Servers in MSSQ Set) + (No. MSSQ Sets) + 7) to determine the appropriate value
? MSGMAP: Number of entries in control map used to manage message segments (Not defined
in NT). Set to 2 * MSGMNI ? MSGMAX: Maximum message size in bytes. Set to the largest message size or 75% of the
queue size (whichever is bigger) ? MSGMNB: This is the queue size itself (64K, 128K, etc.)
? MSGSSZ: Size of a segment in bytes (Not defined in NT). The value of MSGSSZ should be
such that a multiple of MSGSSZ is equal to the size (including the BEA TUXEDO System header) of the most commonly sent message. Usually set to 16, 32, or 64. ? MSGTQL: Total Number of In-Flight messages in the system at once
? MSGSEG: Number of message segments in the system (Not defined in NT). You need to find
out the queue space of your machine and then the following formula applies: MSGSEG * MSGSSZ = Machine Queue Space Size (note it will swap)
Semaphores Parameters
? SEMMNS: Maximum number of semaphores in the system. The minimum requirement for
SEMMNS is MAXACCESSERS - MAXWSCLIENTS + 13 (local clients and all servers) ? SEMMNI: Maximum number of active semaphore sets. For small apps,(100 to 500
servers),10 sets are usually sufficient. For large apps, (>500 servers) 32-64 sets are usually sufficient (do a tmloadcf -c to see which is the best) ? SEMMSL: Maximum number of semaphores per semaphore sets (Not defined in NT). Use
the formula: SEMMNS = SEMMNI * SEMMSL ? SEMMAP: Size of the control map used to control semaphore sets (Not defined in NT). Set
to SEMMNI ? SEMMNU: Number of undo structures in the system. Set to SEMMNS
? SEMUME: Maximum number of undo entries per undo structure (Not defined in NT). Set
to SEMMNS
Shared Memory Parameters
? SHMMAX: Maximum shared memory segment size in bytes. Bulletin Board Size (must be
greater than 1,400,000). Largest BB today is approx. 5 MB (this parameter is normally set much higher for the database, so use their rules) ? SHMSEG: Maximum number of segments one process can attach to (for a busy application
you need to set this from 32-64) ? SHMMNI: Maximum number of shared memory identifiers in the system. Normally the
default of 100 is acceptable (unless more than 100 entities plan on allocating shared memory) ? SHMMIN: Minimum shared memory segment size in bytes. MUST be set to 1.
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BEA Tuxedo管理手册
Other Tunables
? ULIMIT: Maximum file size. ULIMIT needs to be large enough so that you can install BEA
TUXEDO and build servers. 4 megabytes recommended.
? MAXUP: Maximum number of processes per non-super user. The BEA TUXEDO
system processes--servers and administrative processes—run with the UID specified in the application's UBBCONFIG file. MAXUP needs to be large enough to allow all of these processes to run.
? NOFILES: Maximum number of open files per process. A BEA TUXEDO server requires a
minimum of four file descriptors.
? NPROC: Maximum number of processes (systemwide).
? NREGION: Number of region table entries to allocate. Most processes have three regions:
text, data, and stack. Additional regions are needed for each shared memory segment and shared library (text and data) attached. However, the region table entry for the text of a ``shared text'' program is shared by all processes executing that program. Each shared memory segment attached to one or more processes uses another region table entry.
? NUMTIM: Maximum number of STREAMS modules that can be pushed by the Transport
Layer Interface (TLI). A typical default value is 16; you should have it set to at least 256.
? NUMTRW: The number of TLI read/write structures to allocate in kernel data space. A
typical default value is 16; you should have it set to at least 256.
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