Hi Experts
I encountered a situation recently. I wanted to discuss here and understand the reason behind this. My scenario is something like this:
The above command keeps writing the output to the file temp. And this file keeps growing every second. And in the every passing second, the file system is slowly getting full. Now a user, user1, unknowingly deletes this file temp.
Now user2 logs in, and realizes file system is getting full. He searches for all the big files and deletes them, still over a period of time, its getting full because the earlier process is still alive .
I have 2 questions.
1. The moment i kill the process "yes > temp", my file system size comes back to normal(in my actual case from 100 to 27) which makes me understand the process was writing somewhere. Once it got killed, the space got freed. Where was it writing at since the temp file does not exist?
2. The user1 having deleted the file temp, is there any way in which I can associate a file to the process now?
HP UNIX version 10.20
I have been using system variable names in some shell scripts in order to automate execution of some test software. I have recently found that there appears to be a restriction with the 'ls' command when listing specific files (e.g. ls *.c). If I pipe the output into wc, I... (5 Replies)
Hi,
First of all I appreciate this group very much for its informative discussions and posts.
Here is my question.
I have one process whose virtual memory size increases linearly from 6MB to 12MB in 20 minutes. Does that mean my process has memory leaks?
In what cases does the... (4 Replies)
Hi!
I work with HP-UX and I have to monitorize the use of virtual memory for different processes.
(java processes for Tibco Adapter) And if these processes exceed a limit send a message to the syslog.
I donīt know how to monitorize this...
Should I do a script? or use an aplication, for example... (3 Replies)
Hi,
Would any one be so kind to explain me :
are ulimits defined for each user seperately ? When ?
Specialy what is the impact of :
max locked memory
and
virtual memory
on performance of applications for a user.
Many thanks.
PS :
this is what I can see in MAN :
ulimit ]
... (5 Replies)
Hi All,
Does anyone know what the best commands in the UNIX command line are for obtaining this info:
current CPU usage
memory usage
virtual memory usage
preferably with date and time parameters too?
thanks
ocelot (4 Replies)
Hi,
Can anyone please help me workout how much virtual memory I have running on a T2000 running Solaris 10. Thanks
# df -h
swap 3.5G 1.0M 3.5G 1% /etc/svc/volatile
swap 3.5G 208K 3.5G 1% /tmp
swap 3.5G 56K ... (2 Replies)
So, I would ask you a piece of advice about which books or titles could give me comprehensive information about virtual memory in UNIX. Especially, I would found out that virtual address translation corresponds structures of kernel!
Thanks! (2 Replies)
Discussion started by: Fadedfate
2 Replies
LEARN ABOUT PHP
maxdb_rollback
MAXDB_ROLLBACK(3) 1 MAXDB_ROLLBACK(3)maxdb_rollback - Rolls back current transaction
Procedural style
SYNOPSIS
bool maxdb_rollback (resource $link)
DESCRIPTION
Object oriented style
bool maxdb::rollback (void )
Rollbacks the current transaction for the database specified by the $link parameter.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
Object oriented style
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s
", maxdb_connect_error());
exit();
}
/* disable autocommit */
$maxdb->autocommit(FALSE);
$maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city");
$maxdb->query("INSERT INTO temp.mycity SELECT * FROM hotel.city");
/* commit insert */
$maxdb->commit();
/* delete all rows */
$maxdb->query("DELETE FROM temp.mycity");
if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) {
$row = $result->fetch_row();
printf("%d rows in table mycity.
", $row[0]);
/* Free result */
$result->close();
}
/* Rollback */
$maxdb->rollback();
if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) {
$row = $result->fetch_row();
printf("%d rows in table mycity (after rollback).
", $row[0]);
/* Free result */
$result->close();
}
/* Drop table myCity */
$maxdb->query("DROP TABLE temp.mycity");
$maxdb->close();
?>
Example #2
Procedural style
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s
", maxdb_connect_error());
exit();
}
/* disable autocommit */
maxdb_autocommit($link, FALSE);
maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city");
maxdb_query($link, "INSERT INTO temp.mycity SELECT * FROM hotel.city");
/* commit insert */
maxdb_commit($link);
/* delete all rows */
maxdb_query($link, "DELETE FROM temp.mycity");
if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) {
$row = maxdb_fetch_row($result);
printf("%d rows in table mycity.
", $row[0]);
/* Free result */
maxdb_free_result($result);
}
/* Rollback */
maxdb_rollback($link);
if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) {
$row = maxdb_fetch_row($result);
printf("%d rows in table mycity (after rollback).
", $row[0]);
/* Free result */
maxdb_free_result($result);
}
/* Drop table myCity */
maxdb_query($link, "DROP TABLE temp.mycity");
maxdb_close($link);
?>
The above example will output something similar to:
0 rows in table mycity.
25 rows in table mycity (after rollback).
SEE ALSO maxdb_commit(3), maxdb_autocommit(3).
PHP Documentation Group MAXDB_ROLLBACK(3)