MELVYL IAC DATABASES TELNET STATISTICS
Time period: 08/01/01 through 08/31/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 287 998 1,285
Davis 463 13 476
Irvine 284 0 284
Los Angeles 4 220 224
Riverside 118 63 181
San Diego 72 128 200
San Francisco 145 0 145
Santa Barbara 48 61 109
Santa Cruz 64 106 170
LBL 0 86 86
LLL 0 7 7
Los Alamos n/a 2 2
Other - UC 9 81 90
Stanford 155
Other-Network UC n/a 422 422
_______ ______ _____
1,494 2,187 3,836
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 59 182 2,433
2-4 a.m. 23 88 1,527
4-6 a.m. 18 41 1,021
6-8 a.m. 65 155 1,913
8-10 a.m. 399 1,062 12,739
10-12 a.m. 673 1,733 -12,237
12-2 p.m. 714 2,071 28,454
2-4 p.m. 882 2,527 109,384
4-6 p.m. 567 1,446 28,625
6-8 p.m. 194 613 7,085
8-10 p.m. 147 408 4,870
10-12 p.m. 95 279 4,045
__________ __________ __________ _________________
Total: 3,836 10,605 189,859
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 710 2,595 3,305
Davis 1,223 30 1,253
Irvine 802 0 802
Los Angeles 10 556 566
Riverside 351 166 517
San Diego 135 510 645
San Francisco 386 0 386
Santa Barbara 116 240 356
Santa Cruz 144 276 420
LBL 0 316 316
LLL 0 26 26
Los Alamos n/a 27 27
Other - UC 10 192 202
Stanford 554
Other-Network UC n/a 1,230 1,230
_______ ______ _____
3,887 6,164 10,605
Number of FIND commands by database
MAGS database 9,179
NEWS database 935
COMP database 491
Total number of FIND commands 10,605
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 7,342 31,862 39,204
Davis 13,036 536 13,572
Irvine 5,936 0 5,936
Los Angeles 244 8,937 9,181
Riverside 2,062 1,367 3,429
San Diego 630 72,225 72,855
San Francisco 4,441 0 4,441
Santa Barbara 1,119 2,138 3,257
Santa Cruz 1,927 3,842 5,769
LBL 0 5,349 5,349
LLL 0 201 201
Los Alamos n/a 296 296
Other - UC 191 3,328 3,519
Stanford 1,033
Other-Network UC n/a 16,235 16,235
_______ ______ _____
36,928 146,316 184,277
Number of Records Displayed by database:
MAGS database 174,630
NEWS database 1,404
COMP database 13,825
Total number of Records Displayed 184,277
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.4%
Percent of NEWS sessions 9.9%
Percent of COMP sessions 4.7%
Percent of searches done in the MAGS database 86.6%
Percent of searches done in the NEWS database 8.8%
Percent of searches done in the COMP database 4.6%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 3.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:13
Average session length (minutes:seconds) 12:51
Longest session recorded (minutes:seconds) 449:27
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 701.8
Retrievals per search - standard deviation 5942.6
Percent of searches completed with 0 results 27.9%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 59.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,501 27.4%
DISPLAY (excluding automatic displays) 12,820 41.4%
HELP 616 2.0%
EXPLAIN 483 1.6%
SET/RESET 1,398 4.5%
SHOW 100 0.3%
ADD ON (AND, OR, AND NOT) 678 2.2%
LOGON or LOGOFF 4,055 13.1%
COMMENT 1 0.0%
SAVE 631 2.0%
USE 13 0.0%
OTHER 1,679 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 2,126 24.0% 528 24.8% 10 72.1 323.2
TITLE WORD 2,141 24.1% 641 29.9% 15 585.1 5275.9
EXACT TITLE 192 2.2% 86 44.8% 5 148.4 599.6
JOURNAL 485 5.5% 203 41.9% 1,754 7632.6 20935.4
EXACT JOURNAL 247 2.8% 106 42.9% 889 5648.1 10922.2
SUBJECT 1,279 14.4% 438 34.2% 22 268.9 1494.5
EXACT SUBJECT 70 0.8% 20 28.6% 25 209.9 414.1
KEYWORD 1,803 20.3% 360 20.0% 24 839.4 6896.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 17 0.2% 1 5.9% 27 418.8 796.0
DATE 162 1.8% 26 16.0% 30 279.5 768.6
ADDED 7 0.1% 0 0.0% 60,225 46939.0 19248.9
PERIODICAL 157 1.8% 19 12.1% 6 232.8 1221.3
EXACT PE 105 1.2% 18 17.1% 6 30.9 138.6
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 76 0.9% 11 14.5% 2,846 5328.3 7922.6
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 420 5.0% 102 24.3% 22 903.4 2605.5
Single 8,015 95.0% 2,249 28.1% 17 968.5 7072.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 62.1%
LONG 2.8%
FIELDS 1.2%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 30.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:04
Average session length (minutes:seconds) 9:40
Longest session recorded (minutes:seconds) 70:37
Average number of searches completed per session 2.7
Retrievals per search - median 18.5
Retrievals per search - average 1021.7
Retrievals per search - standard deviation 6420.7
Percent of searches completed with 0 results 22.0%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 383 24.5%
DISPLAY (excluding automatic displays) 534 34.1%
HELP 40 2.6%
EXPLAIN 44 2.8%
SET/RESET 93 5.9%
SHOW 17 1.1%
ADD ON (AND, OR, AND NOT) 108 6.9%
LOGON or LOGOFF 242 15.5%
COMMENT 0 0.0%
SAVE 12 0.8%
USE 0 0.0%
OTHER 91 5.8%
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 29 7.3% 18 62.1% 4 24.8 56.3
TITLE WORD 88 22.3% 33 37.5% 14 2873.5 15662.4
EXACT TITLE 2 0.5% 0 0.0% 2 1.5 0.7
JOURNAL 8 2.0% 4 50.0% 8,231 13806.0 16952.3
EXACT JOURNAL 4 1.0% 3 75.0% 29,640 29640.0 0.0
SUBJECT 56 14.2% 24 42.9% 26 981.1 1751.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 186 47.1% 19 10.2% 143 1227.8 4847.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.3% 1 100% 0 0.0 0.0
DATE 10 2.5% 2 20.0% 28 75.3 107.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 5 1.3% 1 20.0% 21 465.0 899.4
EXACT PE 3 0.8% 1 33.3% 28 28.0 36.8
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 3 0.8% 0 0.0% 29 28.0 15.5
By number of indexes:
Multiple 17 4.5% 7 41.2% 36 81.9 100.2
Single 361 95.5% 92 25.5% 55 1786.5 8557.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 60.9%
LONG 0.9%
FIELDS 1.3%
PERIODICALS 1.9%
COMMENTS 0.0%
Other 32.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 2,607
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 144
displays or when any of these paging options is set.
TEXT included with MAIL commands 467
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 6:23
Average session length (minutes:seconds) 10:49
Longest session recorded (minutes:seconds) 117:47
Average number of searches completed per session 2.4
Retrievals per search - median 5.0
Retrievals per search - average 2373.8
Retrievals per search - standard deviation 19228
Percent of searches completed with 0 results 31.8%
Percent of searches entered that are long 3.1%
Percent of long searches completed
(includes partial results) 79.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 785 29.3%
DISPLAY (excluding automatic displays) 668 24.9%
HELP 90 3.4%
EXPLAIN 87 3.2%
SET/RESET 169 6.3%
SHOW 27 1.0%
ADD ON (AND, OR, AND NOT) 150 5.6%
LOGON or LOGOFF 491 18.3%
COMMENT 0 0.0%
SAVE 41 1.5%
USE 1 0.0%
OTHER 172 6.4%
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 71 8.5% 29 40.8% 103 454.7 644.6
TITLE WORD 205 24.7% 83 40.5% 12 654.4 2801.0
EXACT TITLE 7 0.8% 3 42.9% 10 14.5 17.6
JOURNAL 9 1.1% 5 55.6% 6,074 138733 269414
EXACT JOURNAL 5 0.6% 5 100% 0 0.0 0.0
SUBJECT 208 25.0% 68 32.7% 33 1840.4 5813.4
EXACT SUBJECT 2 0.2% 0 0.0% 74 74.0 101.8
KEYWORD 272 32.7% 61 22.4% 25 5686.7 13649.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.4% 0 0.0% 4 14.0 19.1
DATE 38 4.6% 7 18.4% 9 102.4 316.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 8 1.0% 3 37.5% 1 21.2 36.9
EXACT PE 2 0.2% 0 0.0% 39 38.5 13.4
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 1 0.1% 1 100% 0 0.0 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 50 6.4% 9 18.0% 9 88.1 282.8
Single 729 93.6% 247 33.9% 31 4373.0 26495.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
SHORT 49.6%
LONG 2.1%
FIELDS 2.7%
PERIODICALS 0.7%
COMMENTS 0.0%
Other 41.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.2%
Ten most frequent errors:
1. First word of command is invalid 32.3%
2. NS command - no next screen 29.8%
3. FIND command with invalid index name 11.0%
4. PS command - no previous screen 3.4%
5. DISPLAY command contains invalid word 3.4%
6. Valid command at an inappropriate time 2.1%
7. Search term missing from search command 1.7%
8. DISPLAY command-record numbers too large 1.2%
9. Add-on search, no index name after verb 1.2%
10. DISPLAY command - no FIND results 1.1%
11. All others 12.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 21.0%
2. LOCATE (ARTICLE DBS) 15.5%
3. FIND 10.1%
4. INDEXES 8.0%
5. COMMANDS 6.7%
6. MAGS DATABASE 5.4%
7. Unrecognized term 3.3%
8. ADDON SEARCH 2.9%
9. DISPLAYS (IAC DBS) 2.6%
10. DATABASES 2.1%
11. All others 22.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.1%
2. First word of command is invalid 17.0%
3. FIND command with invalid index name 11.3%
4. DISPLAY command-first of >1 screen 6.2%
5. FIND command with zero results 5.4%
6. DISPLAY command-complete in one screen 5.1%
7. DISPLAY command - middle of >1 screen 5.0%
8. FIND command retrieves >1 book 2.7%
9. DISPLAY command - last of >1 screen 2.6%
10. NS command - no next screen 2.1%
11. All others 19.5%
Ten most frequent SHOW requests:
1. HISTORY 43.2%
2. SEARCH 26.5%
3. IAC NEWS 15.2%
4. SETTINGS (IAC DBS) 3.0%
5. SYSTEM NEWS 2.3%
6. LIBRARY NEWS 2.3%
7. GLOSSARY 1.5%
8. MAIL STATUS 1.5%
9. DATABASES 1.5%
10. LOCATION 0.8%
11. All others 2.3%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)