System Limits

System Limits

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Maximum number of usersDetermined by the licence
Maximum number of phantomsDetermined by the licence
Maximum hashed file size16384Gb
Maximum sequential file sizeLimited only by the operating system
Maximum records in a fileLimited only by file size
Maximum record key size63 bytes, configurable to 255 characters (MAXIDLEN parameter). For a directory file, the record id must not be more than 255 characters after translation of characters that are not allowed in operating system pathnames. A record id may contain any character except the mark characters (chars 251 to 255) or the ASCII NUL character (char 0). Null record ids (zero length) are not allowed in QM. If the system is in ECS mode, characters outside the 8-bit character set are only valid for ECS mode files.
Maximum record sizeHashed files: A little under 2Gb or available memory space. Directory files: 1Gb.
Maximum indices per file32
Maximum AK index key size255 bytes
Maximum trigger function name32 bytes
Maximum record locksSet system wide by NUMLOCKS parameter. The upper limit is determined only by available memory.
Maximum number of open filesSet system wide by NUMFILES parameter. Maximum 32767. A single file opened by multiple users counts as one in this calculation.
Maximum QMNet connections10 separate remote server connections from each QM process. Each connection can open multiple files on the remote server.

 

Maximum program size8Mb per program module
Maximum character string sizeA little under 2Gb or available memory space
Maximum integer value32 bits (2147483647). The QM run machine will switch to floating point representation for larger values.
Maximum floating point valueIEEE 64 bit representation. Upper limit 21024.
Maximum digitsThe maximum number of digits allowed in the character string representation of a number is 307 (limited by IEEE floating point format) though precision is limited to approximately 15 digits.
Maximum number of public names in a CLASS module8191 variables, 16383 total
Maximum size of a program for debugging65535 lines

 

Maximum pathname length255 bytes