MELVYL IAC DATABASES TELNET STATISTICS
Time period: 01/13/01 through 01/19/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 83 355 438
Davis 238 0 238
Irvine 146 0 146
Los Angeles 5 127 132
Riverside 76 24 100
San Diego 14 43 57
San Francisco 66 0 66
Santa Barbara 52 40 92
Santa Cruz 62 38 100
LBL 0 10 10
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 5 29 34
Stanford 62
Other-Network UC n/a 133 133
_______ ______ _____
747 799 1,608
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 23 87 1,356
2-4 a.m. 11 40 354
4-6 a.m. 13 34 2,095
6-8 a.m. 35 90 536
8-10 a.m. 158 465 4,513
10-12 a.m. 268 683 6,211
12-2 p.m. 287 677 8,775
2-4 p.m. 320 731 7,824
4-6 p.m. 238 714 7,681
6-8 p.m. 101 357 4,024
8-10 p.m. 93 329 3,298
10-12 p.m. 61 208 2,434
__________ __________ __________ _________________
Total: 1,608 4,415 49,101
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 233 1,098 1,331
Davis 639 0 639
Irvine 376 0 376
Los Angeles 8 316 324
Riverside 189 76 265
San Diego 29 92 121
San Francisco 210 0 210
Santa Barbara 154 111 265
Santa Cruz 150 104 254
LBL 0 20 20
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 5 61 66
Stanford 138
Other-Network UC n/a 406 406
_______ ______ _____
1,993 2,284 4,415
Number of FIND commands by database
MAGS database 3,865
NEWS database 292
COMP database 258
Total number of FIND commands 4,415
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,803 11,262 14,065
Davis 6,001 0 6,001
Irvine 3,205 0 3,205
Los Angeles 174 4,342 4,516
Riverside 2,045 423 2,468
San Diego 151 969 1,120
San Francisco 2,443 0 2,443
Santa Barbara 1,371 1,854 3,225
Santa Cruz 1,280 1,471 2,751
LBL 0 153 153
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 19 437 456
Stanford 240
Other-Network UC n/a 7,419 7,419
_______ ______ _____
19,492 28,330 48,062
Number of Records Displayed by database:
MAGS database 44,263
NEWS database 1,930
COMP database 2,908
Total number of Records Displayed 48,062
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.6%
Percent of NEWS sessions 9.1%
Percent of COMP sessions 5.2%
Percent of searches done in the MAGS database 87.5%
Percent of searches done in the NEWS database 6.6%
Percent of searches done in the COMP database 5.8%
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 2.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:27
Average session length (minutes:seconds) 11:30
Longest session recorded (minutes:seconds) 552:25
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 957.3
Retrievals per search - standard deviation 14760
Percent of searches completed with 0 results 27.9%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 63.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,603 28.4%
DISPLAY (excluding automatic displays) 4,740 37.3%
HELP 341 2.7%
EXPLAIN 248 2.0%
SET/RESET 484 3.8%
SHOW 50 0.4%
ADD ON (AND, OR, AND NOT) 262 2.1%
LOGON or LOGOFF 1,896 14.9%
COMMENT 0 0.0%
SAVE 265 2.1%
USE 4 0.0%
OTHER 802 6.3%
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 885 23.5% 256 28.9% 9 1379.7 32577.1
TITLE WORD 777 20.6% 242 31.1% 9 434.6 4736.4
EXACT TITLE 102 2.7% 51 50.0% 3 33.8 112.3
JOURNAL 174 4.6% 75 43.1% 849 10788.7 30735.0
EXACT JOURNAL 96 2.5% 32 33.3% 1,147 6835.9 14365.4
SUBJECT 492 13.1% 157 31.9% 24 2808.5 44637.3
EXACT SUBJECT 30 0.8% 13 43.3% 50 421.2 954.5
KEYWORD 948 25.2% 193 20.4% 24 906.1 6758.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 8 0.2% 1 12.5% 16 39.4 63.8
DATE 35 0.9% 10 28.6% 14 635.4 2006.2
ADDED 3 0.1% 0 0.0% 33,578 30425.0 5461.2
PERIODICAL 99 2.6% 20 20.2% 4 107.3 532.2
EXACT PE 60 1.6% 4 6.7% 2 5.1 9.4
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 58 1.5% 22 37.9% 44 2287.8 5009.8
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 180 5.0% 68 37.8% 7 7784.3 77179.9
Single 3,400 95.0% 937 27.6% 14 1094.0 8264.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 60.0%
LONG 1.3%
FIELDS 1.0%
PERIODICALS 2.6%
COMMENTS 0.0%
Other 32.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:13
Average session length (minutes:seconds) 11:14
Longest session recorded (minutes:seconds) 150:57
Average number of searches completed per session 3.0
Retrievals per search - median 5.0
Retrievals per search - average 708.8
Retrievals per search - standard deviation 2644.5
Percent of searches completed with 0 results 37.2%
Percent of searches entered that are long 3.1%
Percent of long searches completed
(includes partial results) 37.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 241 25.9%
DISPLAY (excluding automatic displays) 404 43.4%
HELP 17 1.8%
EXPLAIN 23 2.5%
SET/RESET 20 2.2%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 17 1.8%
LOGON or LOGOFF 134 14.4%
COMMENT 0 0.0%
SAVE 26 2.8%
USE 0 0.0%
OTHER 48 5.2%
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 35 14.6% 25 71.4% 5 6.1 4.7
TITLE WORD 37 15.4% 16 43.2% 15 76.8 120.1
EXACT TITLE 1 0.4% 1 100% 0 0.0 0.0
JOURNAL 34 14.2% 18 52.9% 2,708 6644.8 6526.6
EXACT JOURNAL 2 0.8% 2 100% 0 0.0 0.0
SUBJECT 42 17.5% 15 35.7% 43 585.2 1216.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 80 33.3% 9 11.2% 24 764.5 2547.0
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 1 0.4% 1 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 8 3.3% 3 37.5% 102 107.4 23.8
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 4 1.7% 3 75.0% 2 2.0 0.0
Single 232 98.3% 84 36.2% 34 1206.8 3374.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 68.9%
LONG 0.7%
FIELDS 0.5%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 25.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,093
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 75
displays or when any of these paging options is set.
TEXT included with MAIL commands 257
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:12
Average session length (minutes:seconds) 7:59
Longest session recorded (minutes:seconds) 96:29
Average number of searches completed per session 2.0
Retrievals per search - median 6.0
Retrievals per search - average 1901.8
Retrievals per search - standard deviation 24705
Percent of searches completed with 0 results 31.8%
Percent of searches entered that are long 2.4%
Percent of long searches completed
(includes partial results) 71.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 272 30.1%
DISPLAY (excluding automatic displays) 195 21.5%
HELP 51 5.6%
EXPLAIN 45 5.0%
SET/RESET 57 6.3%
SHOW 7 0.8%
ADD ON (AND, OR, AND NOT) 20 2.2%
LOGON or LOGOFF 199 22.0%
COMMENT 0 0.0%
SAVE 22 2.4%
USE 0 0.0%
OTHER 37 4.1%
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 30 10.5% 11 36.7% 17 199.8 510.7
TITLE WORD 71 24.8% 12 16.9% 8 1497.9 5600.0
EXACT TITLE 4 1.4% 2 50.0% 84 83.5 99.7
JOURNAL 3 1.0% 2 66.7% 417925 417925 0.0
EXACT JOURNAL 5 1.7% 4 80.0% 437 437.0 0.0
SUBJECT 78 27.3% 34 43.6% 73 624.4 1984.9
EXACT SUBJECT 2 0.7% 0 0.0% 393 393.0 554.4
KEYWORD 81 28.3% 18 22.2% 36 170.6 452.3
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 7 2.4% 2 28.6% 104 136.6 174.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 4 1.4% 2 50.0% 21 20.5 17.7
EXACT PE 1 0.3% 0 0.0% 40 40.0 0.0
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 0 0.0% 0 0.0% 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 17 6.3% 4 23.5% 22 100.8 154.7
Single 252 93.7% 79 31.3% 33 3166.8 31905.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 48.3%
LONG 1.6%
FIELDS 2.7%
PERIODICALS 0.7%
COMMENTS 0.0%
Other 44.1%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.5%
Ten most frequent errors:
1. First word of command is invalid 36.3%
2. NS command - no next screen 26.9%
3. FIND command with invalid index name 12.6%
4. PS command - no previous screen 3.4%
5. DISPLAY command contains invalid word 3.3%
6. Search term missing from search command 1.8%
7. Valid command at an inappropriate time 1.8%
8. MAIL command issued w/o email address 1.1%
9. DISPLAY command - no FIND results 1.1%
10. NS of SHOW/EXP command-no next screen 0.8%
11. All others 10.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.0%
2. FIND 11.1%
3. LOCATE (ARTICLE DBS) 9.2%
4. COMMANDS 8.5%
5. MAGS DATABASE 7.6%
6. INDEXES 7.0%
7. MAIL 3.8%
8. Unrecognized term 3.8%
9. DATABASES 2.8%
10. ADDON SEARCH 2.8%
11. All others 18.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.4%
2. First word of command is invalid 18.3%
3. FIND command with invalid index name 9.7%
4. FIND command with zero results 7.9%
5. FIND command retrieves >1 book 5.8%
6. DISPLAY command-first of >1 screen 5.4%
7. DISPLAY command - middle of >1 screen 4.0%
8. NS command - no next screen 3.3%
9. PS command - no previous screen 1.9%
10. 3 HELP commands issued from same code 1.2%
11. All others 15.0%
Ten most frequent SHOW requests:
1. HISTORY 48.1%
2. SEARCH 14.8%
3. MAIL SETTINGS 9.3%
4. IAC NEWS 5.6%
5. SETTINGS (IAC DBS) 3.7%
6. GLOSSARY 3.7%
7. SYSTEM NEWS 3.7%
8. MAIL STATUS 3.7%
9. UCSF PASSWORDS 1.9%
10. SYSTEM1 NEWS 1.9%
11. All others 3.7%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)