MELVYL IAC DATABASES TELNET STATISTICS
Time period: 10/01/01 through 10/31/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 557 1,271 1,828
Davis 700 14 714
Irvine 511 0 511
Los Angeles 7 318 325
Riverside 144 76 220
San Diego 45 92 137
San Francisco 157 0 157
Santa Barbara 39 79 118
Santa Cruz 57 72 129
LBL 0 53 53
LLL 0 5 5
Los Alamos n/a 2 2
Other - UC 14 148 162
Stanford 34
Other-Network UC n/a 417 417
_______ ______ _____
2,231 2,547 4,812
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 69 311 2,976
2-4 a.m. 18 93 853
4-6 a.m. 23 73 854
6-8 a.m. 91 253 2,106
8-10 a.m. 407 1,120 9,803
10-12 a.m. 791 2,073 17,920
12-2 p.m. 933 2,159 25,153
2-4 p.m. 1,005 2,779 28,307
4-6 p.m. 740 1,970 28,730
6-8 p.m. 325 915 12,066
8-10 p.m. 261 717 9,181
10-12 p.m. 149 393 5,557
__________ __________ __________ _________________
Total: 4,812 12,856 143,506
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,434 3,191 4,625
Davis 1,728 30 1,758
Irvine 1,578 0 1,578
Los Angeles 17 1,135 1,152
Riverside 382 210 592
San Diego 98 204 302
San Francisco 330 0 330
Santa Barbara 96 189 285
Santa Cruz 190 134 324
LBL 0 124 124
LLL 0 7 7
Los Alamos n/a 6 6
Other - UC 51 403 454
Stanford 82
Other-Network UC n/a 1,237 1,237
_______ ______ _____
5,904 6,870 12,856
Number of FIND commands by database
MAGS database 11,310
NEWS database 1,114
COMP database 432
Total number of FIND commands 12,856
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 13,899 37,969 51,868
Davis 15,597 496 16,093
Irvine 11,361 0 11,361
Los Angeles 89 14,233 14,322
Riverside 3,192 2,113 5,305
San Diego 963 14,194 15,157
San Francisco 5,330 0 5,330
Santa Barbara 531 1,679 2,210
Santa Cruz 759 1,829 2,588
LBL 0 1,446 1,446
LLL 0 288 288
Los Alamos n/a 17 17
Other - UC 356 3,227 3,583
Stanford 190
Other-Network UC n/a 12,948 12,948
_______ ______ _____
52,077 90,439 142,706
Number of Records Displayed by database:
MAGS database 131,302
NEWS database 7,876
COMP database 4,328
Total number of Records Displayed 142,706
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.5%
Percent of NEWS sessions 10.7%
Percent of COMP sessions 3.8%
Percent of searches done in the MAGS database 88.0%
Percent of searches done in the NEWS database 8.7%
Percent of searches done in the COMP database 3.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 4.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:57
Average session length (minutes:seconds) 12:10
Longest session recorded (minutes:seconds) 476:03
Average number of searches completed per session 2.7
Retrievals per search - median 5.0
Retrievals per search - average 508.2
Retrievals per search - standard deviation 4033.9
Percent of searches completed with 0 results 30.4%
Percent of searches entered that are long 2.1%
Percent of long searches completed
(includes partial results) 58.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 10,463 28.4%
DISPLAY (excluding automatic displays) 13,699 37.2%
HELP 1,213 3.3%
EXPLAIN 830 2.3%
SET/RESET 1,677 4.6%
SHOW 154 0.4%
ADD ON (AND, OR, AND NOT) 847 2.3%
LOGON or LOGOFF 5,366 14.6%
COMMENT 0 0.0%
SAVE 623 1.7%
USE 5 0.0%
OTHER 1,942 5.3%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 2,010 18.4% 545 27.1% 10 63.2 241.3
TITLE WORD 2,477 22.7% 785 31.7% 12 403.7 2224.5
EXACT TITLE 304 2.8% 131 43.1% 1 60.0 444.0
JOURNAL 532 4.9% 260 48.9% 1,420 4562.0 9225.8
EXACT JOURNAL 359 3.3% 153 42.6% 946 4570.9 12452.8
SUBJECT 2,415 22.1% 860 35.6% 29 384.6 1829.9
EXACT SUBJECT 152 1.4% 53 34.9% 43 636.3 2228.3
KEYWORD 2,088 19.1% 468 22.4% 28 1149.8 7902.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 21 0.2% 8 38.1% 14 3490.9 8619.4
DATE 172 1.6% 29 16.9% 35 205.5 539.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 187 1.7% 29 15.5% 7 373.6 2820.4
EXACT PE 125 1.1% 20 16.0% 3 10.0 20.3
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 70 0.6% 16 22.9% 32 1450.9 3490.8
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 532 5.1% 180 33.8% 9 402.7 2035.0
Single 9,821 94.9% 2,987 30.4% 19 793.3 5112.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
SHORT 60.0%
LONG 1.6%
FIELDS 1.5%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 32.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:44
Average session length (minutes:seconds) 9:03
Longest session recorded (minutes:seconds) 58:40
Average number of searches completed per session 2.3
Retrievals per search - median 4.0
Retrievals per search - average 231.6
Retrievals per search - standard deviation 1002.1
Percent of searches completed with 0 results 27.8%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 83.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 398 26.0%
DISPLAY (excluding automatic displays) 592 38.6%
HELP 37 2.4%
EXPLAIN 34 2.2%
SET/RESET 88 5.7%
SHOW 7 0.5%
ADD ON (AND, OR, AND NOT) 34 2.2%
LOGON or LOGOFF 211 13.8%
COMMENT 0 0.0%
SAVE 59 3.8%
USE 0 0.0%
OTHER 73 4.8%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 74 17.0% 45 60.8% 2 41.0 147.2
TITLE WORD 151 34.6% 37 24.5% 12 250.6 1219.0
EXACT TITLE 3 0.7% 2 66.7% 2 2.0 0.0
JOURNAL 13 3.0% 10 76.9% 2,443 2128.0 1987.3
EXACT JOURNAL 7 1.6% 5 71.4% 192 191.5 242.5
SUBJECT 49 11.2% 17 34.7% 90 421.2 876.4
EXACT SUBJECT 3 0.7% 1 33.3% 929 929.0 0.0
KEYWORD 85 19.5% 10 11.8% 76 620.6 1632.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 15 3.4% 2 13.3% 25 42.6 55.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 17 3.9% 1 5.9% 1 5.5 9.6
EXACT PE 17 3.9% 1 5.9% 2 5.0 6.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 2 0.5% 1 50.0% 18 18.0 0.0
By number of indexes:
Multiple 37 9.3% 13 35.1% 11 24.8 44.8
Single 360 90.7% 105 29.2% 20 383.3 1281.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.8%
SHORT 56.7%
LONG 0.5%
FIELDS 2.7%
PERIODICALS 4.5%
COMMENTS 0.0%
Other 29.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 2,821
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 113
displays or when any of these paging options is set.
TEXT included with MAIL commands 558
SET DISPLAY TEXT commands 2
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:08
Average session length (minutes:seconds) 9:18
Longest session recorded (minutes:seconds) 125:28
Average number of searches completed per session 2.1
Retrievals per search - median 2.5
Retrievals per search - average 3069.9
Retrievals per search - standard deviation 37858
Percent of searches completed with 0 results 34.1%
Percent of searches entered that are long 4.5%
Percent of long searches completed
(includes partial results) 68.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,030 34.3%
DISPLAY (excluding automatic displays) 666 22.2%
HELP 136 4.5%
EXPLAIN 101 3.4%
SET/RESET 249 8.3%
SHOW 30 1.0%
ADD ON (AND, OR, AND NOT) 84 2.8%
LOGON or LOGOFF 569 19.0%
COMMENT 0 0.0%
SAVE 15 0.5%
USE 0 0.0%
OTHER 121 4.0%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 107 9.9% 34 31.8% 22 262.4 564.0
TITLE WORD 275 25.4% 87 31.6% 13 395.9 2008.2
EXACT TITLE 53 4.9% 33 62.3% 2 94.5 245.1
JOURNAL 23 2.1% 10 43.5% 3,321 205552 290237
EXACT JOURNAL 7 0.6% 3 42.9% 124 10863.5 21557.1
SUBJECT 305 28.1% 127 41.6% 139 2262.5 6585.9
EXACT SUBJECT 5 0.5% 1 20.0% 403 392.3 320.0
KEYWORD 171 15.8% 55 32.2% 11 255.0 757.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 2 2.0 0.0
DATE 44 4.1% 9 20.5% 121 832.1 1563.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 69 6.4% 9 13.0% 4 32.5 134.6
EXACT PE 18 1.7% 1 5.6% 1 6.2 8.8
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 6 0.6% 2 33.3% 50 50.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 68 6.7% 19 27.9% 46 695.7 1413.0
Single 946 93.3% 332 35.1% 14 5224.9 50358.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.5%
SHORT 37.6%
LONG 1.9%
FIELDS 1.3%
PERIODICALS 7.8%
COMMENTS 0.0%
Other 45.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.5%
Ten most frequent errors:
1. First word of command is invalid 36.0%
2. NS command - no next screen 22.4%
3. FIND command with invalid index name 14.6%
4. PS command - no previous screen 4.4%
5. DISPLAY command contains invalid word 2.7%
6. Valid command at an inappropriate time 2.6%
7. Search term missing from search command 2.3%
8. NS of SHOW/EXP command-no next screen 1.4%
9. MAIL command issued w/o email address 1.2%
10. DISPLAY command - no FIND results 1.2%
11. All others 11.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.0%
2. LOCATE (ARTICLE DBS) 20.8%
3. FIND 8.4%
4. COMMANDS 7.7%
5. INDEXES 5.7%
6. MAGS DATABASE 5.5%
7. Unrecognized term 4.9%
8. ADDON SEARCH 3.5%
9. DISPLAYS (IAC DBS) 2.0%
10. DATABASES 1.8%
11. All others 16.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.7%
2. First word of command is invalid 22.0%
3. FIND command with invalid index name 11.3%
4. FIND command with zero results 5.9%
5. DISPLAY command-first of >1 screen 5.1%
6. DISPLAY command-complete in one screen 4.5%
7. DISPLAY command - middle of >1 screen 4.5%
8. FIND command retrieves >1 book 3.1%
9. DISPLAY command - last of >1 screen 1.4%
10. PS command - no previous screen 1.4%
11. All others 17.1%
Ten most frequent SHOW requests:
1. HISTORY 39.4%
2. IAC NEWS 21.8%
3. SEARCH 19.1%
4. MAIL STATUS 3.2%
5. GLOSSARY 2.7%
6. SETTINGS (IAC DBS) 2.1%
7. TIMEOUT SETTING 2.1%
8. MAIL SETTINGS 1.6%
9. Z39.50 NEWS 1.1%
10. SYSTEM NEWS 1.1%
11. All others 5.9%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)