MELVYL IAC DATABASES TELNET STATISTICS
Time period: 10/13/01 through 10/19/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 112 216 328
Davis 147 3 150
Irvine 95 0 95
Los Angeles 2 75 77
Riverside 49 11 60
San Diego 12 20 32
San Francisco 32 0 32
Santa Barbara 6 5 11
Santa Cruz 9 18 27
LBL 0 10 10
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 1 30 31
Stanford 10
Other-Network UC n/a 76 76
_______ ______ _____
465 464 939
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 24 119 591
2-4 a.m. 6 65 356
4-6 a.m. 4 12 40
6-8 a.m. 13 41 385
8-10 a.m. 80 244 2,297
10-12 a.m. 167 440 4,144
12-2 p.m. 164 364 9,867
2-4 p.m. 175 442 5,965
4-6 p.m. 150 362 8,833
6-8 p.m. 70 181 1,842
8-10 p.m. 54 128 1,854
10-12 p.m. 32 73 1,240
__________ __________ __________ _________________
Total: 939 2,471 37,414
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 241 517 758
Davis 339 3 342
Irvine 266 0 266
Los Angeles 4 365 369
Riverside 77 33 110
San Diego 20 80 100
San Francisco 61 0 61
Santa Barbara 7 7 14
Santa Cruz 25 31 56
LBL 0 23 23
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 4 64 68
Stanford 23
Other-Network UC n/a 281 281
_______ ______ _____
1,044 1,404 2,471
Number of FIND commands by database
MAGS database 2,167
NEWS database 212
COMP database 92
Total number of FIND commands 2,471
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,121 6,940 10,061
Davis 4,920 10 4,930
Irvine 1,172 0 1,172
Los Angeles 45 3,354 3,399
Riverside 860 297 1,157
San Diego 113 10,779 10,892
San Francisco 971 0 971
Santa Barbara 45 11 56
Santa Cruz 166 371 537
LBL 0 343 343
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 9 734 743
Stanford 93
Other-Network UC n/a 2,829 2,829
_______ ______ _____
11,422 25,668 37,183
Number of Records Displayed by database:
MAGS database 35,598
NEWS database 1,240
COMP database 576
Total number of Records Displayed 37,183
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.8%
Percent of NEWS sessions 10.4%
Percent of COMP sessions 3.7%
Percent of searches done in the MAGS database 87.7%
Percent of searches done in the NEWS database 8.6%
Percent of searches done in the COMP database 3.7%
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 4.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:41
Average session length (minutes:seconds) 11:37
Longest session recorded (minutes:seconds) 476:03
Average number of searches completed per session 2.7
Retrievals per search - median 7.0
Retrievals per search - average 685.2
Retrievals per search - standard deviation 4805.0
Percent of searches completed with 0 results 28.0%
Percent of searches entered that are long 2.9%
Percent of long searches completed
(includes partial results) 71.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,979 27.5%
DISPLAY (excluding automatic displays) 2,748 38.2%
HELP 276 3.8%
EXPLAIN 165 2.3%
SET/RESET 306 4.3%
SHOW 28 0.4%
ADD ON (AND, OR, AND NOT) 188 2.6%
LOGON or LOGOFF 1,092 15.2%
COMMENT 0 0.0%
SAVE 75 1.0%
USE 0 0.0%
OTHER 336 4.7%
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 377 18.5% 98 26.0% 12 70.6 215.5
TITLE WORD 340 16.7% 95 27.9% 16 579.5 3155.7
EXACT TITLE 52 2.6% 23 44.2% 1 59.9 165.2
JOURNAL 91 4.5% 43 47.3% 1,693 5662.3 10538.0
EXACT JOURNAL 56 2.7% 22 39.3% 1,906 6534.1 18455.3
SUBJECT 515 25.3% 173 33.6% 56 718.2 3030.7
EXACT SUBJECT 64 3.1% 23 35.9% 49 813.4 2855.9
KEYWORD 433 21.2% 77 17.8% 23 1214.0 8034.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.1% 1 33.3% 4,284 4284.0 3169.3
DATE 31 1.5% 2 6.5% 69 253.2 591.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 47 2.3% 3 6.4% 5 881.6 4965.6
EXACT PE 23 1.1% 1 4.3% 3 6.9 10.1
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 0.3% 3 50.0% 6,042 6129.3 6121.5
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 78 4.0% 17 21.8% 15 467.1 1808.6
Single 1,881 96.0% 530 28.2% 24 1025.0 5998.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 60.0%
LONG 1.2%
FIELDS 1.9%
PERIODICALS 2.4%
COMMENTS 0.0%
Other 31.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 9:03
Average session length (minutes:seconds) 14:32
Longest session recorded (minutes:seconds) 58:40
Average number of searches completed per session 2.6
Retrievals per search - median 1.0
Retrievals per search - average 120.8
Retrievals per search - standard deviation 505.7
Percent of searches completed with 0 results 26.1%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 85 34.1%
DISPLAY (excluding automatic displays) 86 34.5%
HELP 4 1.6%
EXPLAIN 4 1.6%
SET/RESET 22 8.8%
SHOW 1 0.4%
ADD ON (AND, OR, AND NOT) 7 2.8%
LOGON or LOGOFF 31 12.4%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 9 3.6%
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 16 17.4% 9 56.3% 1 3.7 6.8
TITLE WORD 45 48.9% 10 22.2% 6 134.9 584.2
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 1 1.1% 1 100% 0 0.0 0.0
EXACT JOURNAL 1 1.1% 1 100% 0 0.0 0.0
SUBJECT 3 3.3% 2 66.7% 15 15.0 0.0
EXACT SUBJECT 2 2.2% 0 0.0% 929 929.0 0.0
KEYWORD 9 9.8% 2 22.2% 10 562.6 1171.6
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 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 7 7.6% 1 14.3% 2 4.5 6.7
EXACT PE 8 8.7% 1 12.5% 2 5.6 6.8
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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 7 8.2% 3 42.9% 1 1.0 0.0
Single 78 91.8% 21 26.9% 8 186.2 633.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 11.1%
SHORT 39.4%
LONG 0.0%
FIELDS 1.7%
PERIODICALS 11.7%
COMMENTS 0.0%
Other 36.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 500
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 21
displays or when any of these paging options is set.
TEXT included with MAIL commands 83
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:26
Average session length (minutes:seconds) 11:12
Longest session recorded (minutes:seconds) 125:28
Average number of searches completed per session 2.1
Retrievals per search - median 3.5
Retrievals per search - average 5150.1
Retrievals per search - standard deviation 60429
Percent of searches completed with 0 results 27.1%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 188 31.8%
DISPLAY (excluding automatic displays) 155 26.2%
HELP 23 3.9%
EXPLAIN 20 3.4%
SET/RESET 53 9.0%
SHOW 13 2.2%
ADD ON (AND, OR, AND NOT) 24 4.1%
LOGON or LOGOFF 99 16.7%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 17 2.9%
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 20 9.9% 7 35.0% 7 54.0 159.5
TITLE WORD 57 28.1% 19 33.3% 24 437.7 1371.3
EXACT TITLE 4 2.0% 0 0.0% 1 1.0 0.0
JOURNAL 8 3.9% 4 50.0% 72,541 252350 413234
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 32 15.8% 12 37.5% 32 305.0 463.3
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 32 15.8% 7 21.9% 9 326.7 811.1
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 10 4.9% 4 40.0% 17 125.0 248.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 31 15.3% 2 6.5% 4 18.4 39.5
EXACT PE 5 2.5% 0 0.0% 5 4.4 3.4
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 4 2.0% 0 0.0% 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 15 8.1% 7 46.7% 17 509.0 1156.2
Single 171 91.9% 40 23.4% 9 7895.3 76405.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.7%
SHORT 30.4%
LONG 1.4%
FIELDS 0.9%
PERIODICALS 17.2%
COMMENTS 0.0%
Other 42.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.6%
Ten most frequent errors:
1. First word of command is invalid 36.5%
2. NS command - no next screen 22.9%
3. FIND command with invalid index name 16.6%
4. PS command - no previous screen 4.6%
5. Valid command at an inappropriate time 2.9%
6. Search term missing from search command 2.5%
7. DISPLAY command contains invalid word 2.0%
8. NS of SHOW/EXP command-no next screen 1.6%
9. MAIL command issued w/o email address 1.0%
10. DISPLAY command - no FIND results 1.0%
11. All others 8.5%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.0%
2. LOCATE (ARTICLE DBS) 22.2%
3. FIND 7.4%
4. COMMANDS 6.9%
5. MAGS DATABASE 6.3%
6. ADDON SEARCH 6.3%
7. Unrecognized term 5.3%
8. INDEXES 4.2%
9. NEWS DATABASE 1.6%
10. DATABASES 1.6%
11. All others 11.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.8%
2. First word of command is invalid 23.0%
3. FIND command with invalid index name 12.4%
4. DISPLAY command-first of >1 screen 5.7%
5. DISPLAY command - middle of >1 screen 5.7%
6. FIND command with zero results 4.5%
7. DISPLAY command-complete in one screen 3.3%
8. FIND command retrieves >1 book 2.8%
9. 3 HELP commands issued from same code 2.2%
10. NS command - no next screen 1.8%
11. All others 14.8%
Ten most frequent SHOW requests:
1. HISTORY 43.9%
2. SEARCH 24.4%
3. IAC NEWS 14.6%
4. SETTINGS (IAC DBS) 4.9%
5. GLOSSARY 2.4%
6. EXPERIMENTS 2.4%
7. MAIL SETTINGS 2.4%
8. EXPERIMENT 53 2.4%
9. MEDLINE NEWS 2.4%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)