MELVYL IAC DATABASES TELNET STATISTICS
Time period: 08/01/99 through 08/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,373 2,541 3,914
Davis 1,270 242 1,512
Irvine 1,328 0 1,328
Los Angeles 238 1,303 1,541
Riverside 560 115 675
San Diego 202 336 538
San Francisco 480 13 493
Santa Barbara 555 282 837
Santa Cruz 840 451 1,291
LBL 0 100 100
LLL 0 30 30
Los Alamos n/a 10 10
Other - UC 75 234 309
Stanford 461
Other-Network UC n/a 1,137 1,137
_______ ______ _____
6,921 6,794 14,176
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 259 1,185 16,073
2-4 a.m. 125 604 10,169
4-6 a.m. 60 206 3,443
6-8 a.m. 202 512 6,309
8-10 a.m. 1,155 3,116 29,039
10-12 a.m. 2,378 7,217 82,841
12-2 p.m. 2,679 8,250 90,341
2-4 p.m. 3,332 10,063 110,091
4-6 p.m. 2,341 7,303 81,484
6-8 p.m. 799 2,622 33,705
8-10 p.m. 440 1,865 21,650
10-12 p.m. 406 1,682 23,229
__________ __________ __________ _________________
Total: 14,176 44,625 508,374
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,149 7,237 11,386
Davis 3,959 1,152 5,111
Irvine 4,141 0 4,141
Los Angeles 756 4,388 5,144
Riverside 1,853 307 2,160
San Diego 611 1,006 1,617
San Francisco 1,062 27 1,089
Santa Barbara 1,548 818 2,366
Santa Cruz 2,862 1,390 4,252
LBL 0 243 243
LLL 0 65 65
Los Alamos n/a 35 35
Other - UC 143 731 874
Stanford 1,670
Other-Network UC n/a 4,472 4,472
_______ ______ _____
21,084 21,871 44,625
Number of FIND commands by database
MAGS database 39,324
NEWS database 3,463
COMP database 1,838
Total number of FIND commands 44,625
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 45,585 81,281 126,866
Davis 43,260 6,004 49,264
Irvine 41,605 0 41,605
Los Angeles 7,790 65,405 73,195
Riverside 20,688 2,777 23,465
San Diego 4,494 9,689 14,183
San Francisco 14,182 291 14,473
Santa Barbara 18,178 12,705 30,883
Santa Cruz 28,349 16,351 44,700
LBL 0 1,792 1,792
LLL 0 596 596
Los Alamos n/a 337 337
Other - UC 1,319 8,322 9,641
Stanford 2,567
Other-Network UC n/a 60,527 60,527
_______ ______ _____
225,450 266,077 494,094
Number of Records Displayed by database:
MAGS database 460,156
NEWS database 30,009
COMP database 18,209
Total number of Records Displayed 494,094
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.1%
Percent of NEWS sessions 10.0%
Percent of COMP sessions 4.9%
Percent of searches done in the MAGS database 88.1%
Percent of searches done in the NEWS database 7.8%
Percent of searches done in the COMP database 4.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 2.6
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 2.6
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:10
Average session length (minutes:seconds) 12:43
Longest session recorded (minutes:seconds) 577:29
Average number of searches completed per session 3.2
Retrievals per search - median 5.0
Retrievals per search - average 482.8
Retrievals per search - standard deviation 4111.8
Percent of searches completed with 0 results 29.9%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 58.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 37,029 28.4%
DISPLAY (excluding automatic displays) 52,850 40.6%
HELP 3,264 2.5%
EXPLAIN 2,680 2.1%
SET/RESET 4,319 3.3%
SHOW 652 0.5%
ADD ON (AND, OR, AND NOT) 2,295 1.8%
LOGON or LOGOFF 16,222 12.5%
COMMENT 4 0.0%
SAVE 2,255 1.7%
USE 81 0.1%
OTHER 8,616 6.6%
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 7,308 18.9% 2,157 29.5% 9 61.7 230.0
TITLE WORD 8,703 22.6% 2,601 29.9% 13 403.0 2437.1
EXACT TITLE 812 2.1% 377 46.4% 3 91.4 408.8
JOURNAL 1,922 5.0% 1,029 53.5% 828 5066.2 11566.5
EXACT JOURNAL 1,132 2.9% 531 46.9% 727 3856.4 9250.8
SUBJECT 6,762 17.5% 2,529 37.4% 35 333.5 1512.7
EXACT SUBJECT 365 0.9% 130 35.6% 26 399.6 1239.4
KEYWORD 8,758 22.7% 1,713 19.6% 29 892.9 7410.4
SUBFILE 21 0.1% 0 0.0% 62 663.3 2169.3
PUBLICATION TYPE 130 0.3% 43 33.1% 11 228.8 1007.9
DATE 449 1.2% 80 17.8% 32 175.4 584.0
ADDED 19 0.0% 2 10.5% 18,706 21098.1 14872.5
PERIODICAL 1,522 3.9% 274 18.0% 4 132.2 923.2
EXACT PE 373 1.0% 65 17.4% 3 128.1 1236.3
RPE 2 0.0% 1 50.0% 70 70.0 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 296 0.8% 44 14.9% 473 2510.1 6137.1
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 1,787 4.9% 527 29.5% 11 500.9 2733.3
Single 34,918 95.1% 10,492 30.0% 19 715.4 5099.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 61.9%
LONG 1.5%
FIELDS 0.7%
PERIODICALS 3.1%
COMMENTS 0.0%
Other 30.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 7:04
Average session length (minutes:seconds) 11:44
Longest session recorded (minutes:seconds) 155:21
Average number of searches completed per session 2.6
Retrievals per search - median 7.0
Retrievals per search - average 825.8
Retrievals per search - standard deviation 5001.8
Percent of searches completed with 0 results 29.3%
Percent of searches entered that are long 2.9%
Percent of long searches completed
(includes partial results) 66.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,576 25.1%
DISPLAY (excluding automatic displays) 2,448 38.9%
HELP 143 2.3%
EXPLAIN 156 2.5%
SET/RESET 312 5.0%
SHOW 40 0.6%
ADD ON (AND, OR, AND NOT) 262 4.2%
LOGON or LOGOFF 863 13.7%
COMMENT 0 0.0%
SAVE 150 2.4%
USE 2 0.0%
OTHER 339 5.4%
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 173 10.4% 101 58.4% 3 29.8 70.9
TITLE WORD 422 25.4% 146 34.6% 26 243.8 922.7
EXACT TITLE 11 0.7% 7 63.6% 177 140.0 74.0
JOURNAL 46 2.8% 24 52.2% 2,258 7326.6 10638.9
EXACT JOURNAL 30 1.8% 8 26.7% 1,424 7920.0 11135.7
SUBJECT 288 17.3% 87 30.2% 74 1603.0 8761.6
EXACT SUBJECT 22 1.3% 11 50.0% 175 2215.5 4989.7
KEYWORD 564 33.9% 116 20.6% 52 1549.6 6904.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 13 0.8% 2 15.4% 17 1601.5 4865.4
DATE 41 2.5% 10 24.4% 25 52.8 67.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 28 1.7% 5 17.9% 7 219.8 458.6
EXACT PE 20 1.2% 1 5.0% 3 12.4 28.8
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 4 0.2% 1 25.0% 580 400.7 310.6
By number of indexes:
Multiple 106 6.8% 37 34.9% 25 469.8 2130.2
Single 1,448 93.2% 445 30.7% 40 1402.8 6626.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
SHORT 62.7%
LONG 1.0%
FIELDS 2.2%
PERIODICALS 2.3%
COMMENTS 0.0%
Other 28.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 11,098
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 473
displays or when any of these paging options is set.
TEXT included with MAIL commands 2,765
SET DISPLAY TEXT commands 2
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:22
Average session length (minutes:seconds) 12:11
Longest session recorded (minutes:seconds) 1128
Average number of searches completed per session 2.4
Retrievals per search - median 3.0
Retrievals per search - average 1820.2
Retrievals per search - standard deviation 26450
Percent of searches completed with 0 results 37.8%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 63.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,270 35.2%
DISPLAY (excluding automatic displays) 2,259 24.3%
HELP 305 3.3%
EXPLAIN 228 2.5%
SET/RESET 720 7.7%
SHOW 70 0.8%
ADD ON (AND, OR, AND NOT) 193 2.1%
LOGON or LOGOFF 1,581 17.0%
COMMENT 1 0.0%
SAVE 214 2.3%
USE 3 0.0%
OTHER 447 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 297 8.6% 175 58.9% 9 203.7 426.9
TITLE WORD 844 24.4% 309 36.6% 14 867.1 4978.1
EXACT TITLE 29 0.8% 21 72.4% 2 13.8 21.1
JOURNAL 58 1.7% 33 56.9% 145 182989 251540
EXACT JOURNAL 39 1.1% 18 46.2% 39 2311.9 8075.2
SUBJECT 1,027 29.7% 398 38.8% 27 613.3 2269.0
EXACT SUBJECT 17 0.5% 8 47.1% 154 685.9 1154.7
KEYWORD 1,008 29.1% 292 29.0% 22 1098.2 7367.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 8 0.2% 3 37.5% 4 37.8 51.9
DATE 105 3.0% 34 32.4% 16 76.1 159.4
ADDED 1 0.0% 0 0.0% 4 4.0 0.0
PERIODICAL 18 0.5% 10 55.6% 8 34.0 49.0
EXACT PE 7 0.2% 2 28.6% 11 26.0 27.6
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 5 0.1% 3 60.0% 55 55.0 72.1
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 210 6.5% 80 38.1% 14 547.4 3461.2
Single 3,032 93.5% 1,141 37.6% 22 3253.5 35565.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
SHORT 46.4%
LONG 3.4%
FIELDS 1.4%
PERIODICALS 0.4%
COMMENTS 0.0%
Other 44.1%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.1%
Ten most frequent errors:
1. First word of command is invalid 34.6%
2. NS command - no next screen 25.6%
3. FIND command with invalid index name 10.5%
4. DISPLAY command contains invalid word 4.3%
5. PS command - no previous screen 3.9%
6. Search term missing from search command 2.1%
7. Valid command at an inappropriate time 2.0%
8. MAIL command issued w/o email address 1.9%
9. DISPLAY command - no FIND results 1.2%
10. DISPLAY command-record numbers too large 1.1%
11. All others 12.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 20.9%
2. LOCATE (ARTICLE DBS) 15.5%
3. FIND 13.2%
4. COMMANDS 7.6%
5. INDEXES 6.6%
6. Unrecognized term 4.9%
7. MAGS DATABASE 4.1%
8. MAIL 3.5%
9. DISPLAYS (IAC DBS) 3.1%
10. DATABASES 1.9%
11. All others 18.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.2%
2. First word of command is invalid 18.0%
3. FIND command with invalid index name 9.2%
4. FIND command with zero results 7.2%
5. DISPLAY command-first of >1 screen 5.3%
6. DISPLAY command - middle of >1 screen 4.8%
7. DISPLAY command-complete in one screen 4.7%
8. NS command - no next screen 3.4%
9. FIND command retrieves >1 book 3.1%
10. PS command - no previous screen 2.1%
11. All others 19.0%
Ten most frequent SHOW requests:
1. HISTORY 40.4%
2. SEARCH 25.0%
3. MAIL STATUS 7.9%
4. MAIL SETTINGS 4.6%
5. SETTINGS (IAC DBS) 4.5%
6. SYSTEM NEWS 3.8%
7. GLOSSARY 3.4%
8. IAC NEWS 3.1%
9. DISPLAY 2.7%
10. LIBRARY NEWS 1.1%
11. All others 3.6%