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82%
Reading and understanding database execution plans
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Gunnar Pippel, 123RF.com
"."EUR_VALUE">=10) 26 3 - access<+>6<+>( "S"."SALE_DATE">TRUNC(SYSDATE@!) 27 -INTERVAL'+00-06' YEAR(2) TO MONTH) 1  The explain plan for command only stores the execution plan in the PLAN_TABLE. 2  The DBMS
81%
Maatkit tools for database administrators
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
tiero, 123RF
sprzblog mysql limesurvey -uroot -ppassword > backup.sql will take 21 seconds to complete: real 0m21.626s user 0m0.000s sys 0m0.000s In the case of larger databases on non-replicated servers
81%
One metric to rule them all
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
/loadavg/ [3]: 1.00 0.97 0.94 1/1279 7743 The three additional numbers provided by Linux are the number of running processes (one in this case), the total number of processes, and the last process ID (PID
81%
Cgroups for resource management in Linux
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Photographer, 123RF.com
cgroup, which has no restrictions. You can test this by sending a SIGUSR1 to the process: # kill -USR1 $pid 578804+0 records in 578804+0 records out 296347648 bytes (296 MB) copied, 7.00803 s, 42.3 MB/s
80%
Touring the top Knoppix debugging and rescue tools
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Rafal Olechowski, 123RF.com
: 1487680 0 IO-APIC-fasteoi uhci_hcd:usb3 14 22: 22998855 0 IO-APIC-fasteoi psb@pci:0000:00:02.0 15 23: 3084145 0 IO-APIC-fasteoi hda_intel 16 24: 1 0 ... 0
80%
Check your VoIP networks with SIPVicious and sngrep
30.11.2025
Home »  Archive  »  2025  »  Issue 90 VoIP N...  » 
Photo by Quino Al on Unsplash
(6192 bits), 774 bytes captured (6192 bits) Ethernet II, Src: 00:1a:2b:3c:4d:5e, Dst: 00:6f:7g:8h:9i:0j Internet Protocol Version 4, Src: 192.168.1.101, Dst: 192.168.1.104 User Datagram Protocol, Src Port
80%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© kudryashka, 123RF.com
Model"; 11 $work = "ebiz-tx"; 12 $node1 = "WebServer"; 13 $node2 = "AppServer"; 14 $node3 = "DBMServer"; 15 $think = 0.0 * 1e-3; # as per test system 16 $dtime = 2.2 * 1e-3; # dummy service time 17 18
80%
Introduction to LVM
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Dvarg, 123RF.com
to modify their paths or work with alias constructions, or they can replace the disk(s) with a larger model and restore a backup of the complete system to the new disk. This last approach means
80%
Introduction to OpenMP programming
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Frank Rohde, 123RF.com
(pi*x)*dexp(-pi) 098 ENDDO 099 100 ! Bottom of unit square: (S) 101 DO i=1,m 102 x=delta*i 103 u(i,1) = dsin(pi*x) 104 ENDDO 105 106 ! Right hand side of unit square: (E) 107 DO j=1,m 108 u(m,j) = 0.0d0 109
79%
I/O benchmarks with Fio
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© Kheng Ho Toh, 123RF.com
/0K /s] [4137 /0 iops] [eta 00m:06s] In the example, the first job is performing a sequential read, marked as r in square brackets, while Fio hasn't initialized the second job, marked as P

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