mq_open too many files


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users mq_open too many files
# 1  
Old 04-28-2006
mq_open too many files

On True64 UNIX, in a process, how many message queues can be open and how to increase it if the value has been out of the system limits. In our program, we want to create 1000 message queues,the mq_open returns the error message "too many open files".thanks
# 2  
Old 04-28-2006
check for msgmni parameter in /etc/system file

by default value would be 256

that would indicate maximum how many message queue identifiers you can have

if you change that parameter dont forget to reboot the system.
# 3  
Old 04-29-2006
msgmni para performs in System V, but I use the POSIX function mq_open, I think it has something to do with open file descriptor, but which para and how to increase ....
# 4  
Old 05-01-2006
I said that with respect to Solaris 5.9

If its the case of open file descriptors.. did you try or check out with the Kernel Tunable parameters.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Automate splitting of files , scp files as each split completes and combine files on target server

i use the split command to split a one terabyte backup file into 10 chunks of 100 GB each. The files are split one after the other. While the files is being split, I will like to scp the files one after the other as soon as the previous one completes, from server A to Server B. Then on server B ,... (2 Replies)
Discussion started by: malaika
2 Replies

2. Shell Programming and Scripting

How to create zip/gz/tar files for if the files are older than particular days in UNIX or Linux?

I need a script file for backup (zip or tar or gz) of old log files in our unix server (causing the space problem). Could you please help me to create the zip or gz files for each log files in current directory and sub-directories also? I found one command which is to create gz file for the... (4 Replies)
Discussion started by: Mallikgm
4 Replies

3. Programming

POSIX message queue mq_open directory

hello, I try to test the POSIX mq_open function on book unp like below: #include "unpipc.h" # include <mqueue.h> int main(int argc, char **argv) { int c, flags; mqd_t mqd; flags = O_RDWR | O_CREAT; while ((c = getopt(argc, argv, "e")) != -1) { ... (3 Replies)
Discussion started by: anpufeng
3 Replies

4. UNIX for Dummies Questions & Answers

write a program in c in unix that display the files(includ sub-direc and files within) in a sorted

the sorting is based on name of file, file size modification time stamps o f file it should dislay the output in the following format "." and ".." enteries should be ignored please give some idea how to do it (1 Reply)
Discussion started by: pappu kumar jha
1 Replies

5. Shell Programming and Scripting

How to extract data from indexed files (ISAM files) maintained in an unix server.

Hi, Could someone please assist on a quick way of How to extract data from indexed files (ISAM files) maintained in an UNIX(AIX) server.The file data needs to be extracted in flat text file or CSV or excel format . Usually we have programs in microfocus COBOL to extract data, but would like... (2 Replies)
Discussion started by: devina
2 Replies

6. Programming

creating a message queue using mq_open

Hi all, First of all thanks in advance for reading my post and for your heart for helping me. I am trying to create a message queue using mq_open(name,oflags,mode_t,attr) method. But that function call is returning with an error code EFAULT. By googling it I found that it happens when there is... (10 Replies)
Discussion started by: parusasi
10 Replies

7. Shell Programming and Scripting

How to retrieve all the linked script files/ctl files/sql files?

Hi I am going to migrate our datawarehouse system from HP Tru 64 Unix to the Red Hat Linux. Inside the box, it is running around 40 cron jobs; inside each cron job, it is calling other shell script files, and the shell script files may again call other shell script files or ctl files(for... (1 Reply)
Discussion started by: franksubramania
1 Replies

8. Programming

mq_open error

Hi, Am creating a msgqueue using mq_open </code> main() { struct mq_attr attr; /* message queue attributes structure */ memset(&_attr,0,sizeof(struct mq_attr)); attr.mq_maxmsg= 10; attr.mq_msgsize= 20; msg.flag = HS_FWK_MSGQ_FLAGS;... (2 Replies)
Discussion started by: rvan
2 Replies

9. HP-UX

error mq_open message queue

Hello, J work on a HP. I want to create message queue by using mq_open with this parameters: mq_open(p,O_CREAT|O_WRONLY|O_EXCL|0_NONBLOCK,0600,&queue_attr) with p char and the function returns the value -1 and errno equal 2. can you help me ? Thank. (3 Replies)
Discussion started by: AUBERT
3 Replies

10. Programming

mq_open Hanging

One of my program which uses posix message queues was hanging in mq_open() system call, and after some time, it threw an error "Interrupted system call". I couldnt even unlink that message queue using mq_unlink(), as I have to use mq_open() prior to mq_unlink(). I use SunOS 5.7 Generic_106541-22... (0 Replies)
Discussion started by: Deepa
0 Replies
Login or Register to Ask a Question