MELVYL IAC DATABASES TELNET STATISTICS
Time period: 10/27/01 through 11/02/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 146 199 345
Davis 167 4 171
Irvine 78 0 78
Los Angeles 0 73 73
Riverside 9 13 22
San Diego 8 27 35
San Francisco 39 0 39
Santa Barbara 5 21 26
Santa Cruz 16 16 32
LBL 0 8 8
LLL 0 1 1
Los Alamos n/a 1 1
Other - UC 2 35 37
Stanford 5
Other-Network UC n/a 132 132
_______ ______ _____
470 530 1,005
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 13 77 847
2-4 a.m. 5 9 120
4-6 a.m. 6 10 65
6-8 a.m. 31 74 790
8-10 a.m. 90 241 2,652
10-12 a.m. 160 359 3,672
12-2 p.m. 176 387 4,541
2-4 p.m. 225 559 5,757
4-6 p.m. 152 464 3,874
6-8 p.m. 64 188 1,612
8-10 p.m. 54 122 1,766
10-12 p.m. 29 64 925
__________ __________ __________ _________________
Total: 1,005 2,554 26,621
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 435 462 897
Davis 384 12 396
Irvine 170 0 170
Los Angeles 0 193 193
Riverside 34 43 77
San Diego 12 40 52
San Francisco 73 0 73
Santa Barbara 19 97 116
Santa Cruz 47 33 80
LBL 0 36 36
LLL 0 4 4
Los Alamos n/a 1 1
Other - UC 3 70 73
Stanford 12
Other-Network UC n/a 374 374
_______ ______ _____
1,177 1,365 2,554
Number of FIND commands by database
MAGS database 2,207
NEWS database 184
COMP database 163
Total number of FIND commands 2,554
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,478 5,344 9,822
Davis 3,700 178 3,878
Irvine 1,420 0 1,420
Los Angeles 0 1,921 1,921
Riverside 309 573 882
San Diego 68 254 322
San Francisco 768 0 768
Santa Barbara 137 1,388 1,525
Santa Cruz 88 491 579
LBL 0 171 171
LLL 0 256 256
Los Alamos n/a 3 3
Other - UC 7 696 703
Stanford 26
Other-Network UC n/a 4,258 4,258
_______ ______ _____
10,975 15,533 26,534
Number of Records Displayed by database:
MAGS database 23,890
NEWS database 1,170
COMP database 1,561
Total number of Records Displayed 26,534
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 84.5%
Percent of NEWS sessions 9.3%
Percent of COMP sessions 6.3%
Percent of searches done in the MAGS database 86.4%
Percent of searches done in the NEWS database 7.2%
Percent of searches done in the COMP database 6.4%
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 1.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 1.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:23
Average session length (minutes:seconds) 11:45
Longest session recorded (minutes:seconds) 397:00
Average number of searches completed per session 2.6
Retrievals per search - median 6.0
Retrievals per search - average 496.5
Retrievals per search - standard deviation 3120.4
Percent of searches completed with 0 results 29.6%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 36.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,068 29.4%
DISPLAY (excluding automatic displays) 2,435 34.6%
HELP 278 3.9%
EXPLAIN 182 2.6%
SET/RESET 350 5.0%
SHOW 38 0.5%
ADD ON (AND, OR, AND NOT) 139 2.0%
LOGON or LOGOFF 1,104 15.7%
COMMENT 0 0.0%
SAVE 113 1.6%
USE 2 0.0%
OTHER 334 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 469 21.8% 123 26.2% 12 60.7 251.0
TITLE WORD 517 24.1% 175 33.8% 14 361.1 1907.1
EXACT TITLE 54 2.5% 21 38.9% 6 210.2 990.1
JOURNAL 108 5.0% 47 43.5% 1,608 3941.8 7505.3
EXACT JOURNAL 66 3.1% 30 45.5% 840 5949.9 11635.8
SUBJECT 364 16.9% 130 35.7% 23 417.7 1873.3
EXACT SUBJECT 48 2.2% 15 31.3% 31 581.9 2133.0
KEYWORD 393 18.3% 87 22.1% 32 1130.7 5486.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.1% 0 0.0% 5 4.5 3.5
DATE 33 1.5% 5 15.2% 24 210.9 626.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 63 2.9% 3 4.8% 6 363.5 1825.2
EXACT PE 18 0.8% 3 16.7% 3 13.0 26.7
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 13 0.6% 5 38.5% 143 461.4 1020.2
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 80 3.9% 26 32.5% 13 745.5 3593.2
Single 1,972 96.1% 587 29.8% 19 736.2 3831.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 56.8%
LONG 1.8%
FIELDS 1.4%
PERIODICALS 2.7%
COMMENTS 0.0%
Other 34.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 12:19
Average session length (minutes:seconds) 15:40
Longest session recorded (minutes:seconds) 78:19
Average number of searches completed per session 2.6
Retrievals per search - median 1.0
Retrievals per search - average 464.6
Retrievals per search - standard deviation 3766.4
Percent of searches completed with 0 results 41.1%
Percent of searches entered that are long 2.5%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 149 30.0%
DISPLAY (excluding automatic displays) 183 36.9%
HELP 10 2.0%
EXPLAIN 11 2.2%
SET/RESET 43 8.7%
SHOW 2 0.4%
ADD ON (AND, OR, AND NOT) 14 2.8%
LOGON or LOGOFF 52 10.5%
COMMENT 0 0.0%
SAVE 18 3.6%
USE 0 0.0%
OTHER 14 2.8%
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 76 46.9% 45 59.2% 2 13.7 22.7
TITLE WORD 34 21.0% 8 23.5% 34 593.1 2282.5
EXACT TITLE 1 0.6% 0 0.0% 2 2.0 0.0
JOURNAL 5 3.1% 4 80.0% 2,443 2443.0 0.0
EXACT JOURNAL 2 1.2% 1 50.0% 20 20.0 0.0
SUBJECT 10 6.2% 4 40.0% 18 27.5 22.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 21 13.0% 5 23.8% 108 3451.4 11531.2
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 4 2.5% 1 25.0% 20 19.0 17.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 1.9% 1 33.3% 3 3.0 2.8
EXACT PE 4 2.5% 0 0.0% 2 3.5 3.8
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 2 1.2% 1 50.0% 18 18.0 0.0
By number of indexes:
Multiple 12 8.1% 5 41.7% 18 19.9 22.8
Single 137 91.9% 59 43.1% 15 942.5 5419.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.1%
SHORT 56.1%
LONG 1.6%
FIELDS 3.5%
PERIODICALS 2.2%
COMMENTS 0.0%
Other 29.5%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 456
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 41
displays or when any of these paging options is set.
TEXT included with MAIL commands 55
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:27
Average session length (minutes:seconds) 9:20
Longest session recorded (minutes:seconds) 67:55
Average number of searches completed per session 2.0
Retrievals per search - median 1.0
Retrievals per search - average 2744.2
Retrievals per search - standard deviation 35745
Percent of searches completed with 0 results 42.6%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 183 32.9%
DISPLAY (excluding automatic displays) 128 23.0%
HELP 38 6.8%
EXPLAIN 20 3.6%
SET/RESET 39 7.0%
SHOW 6 1.1%
ADD ON (AND, OR, AND NOT) 1 0.2%
LOGON or LOGOFF 117 21.0%
COMMENT 0 0.0%
SAVE 4 0.7%
USE 0 0.0%
OTHER 20 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 11 5.8% 2 18.2% 4 14.8 23.4
TITLE WORD 61 32.3% 28 45.9% 12 40.8 67.1
EXACT TITLE 16 8.5% 9 56.3% 2 146.4 381.7
JOURNAL 5 2.6% 4 80.0% 483625 483625 0.0
EXACT JOURNAL 1 0.5% 0 0.0% 1 1.0 0.0
SUBJECT 40 21.2% 17 42.5% 19 251.2 448.7
EXACT SUBJECT 2 1.1% 1 50.0% 91 91.0 0.0
KEYWORD 30 15.9% 14 46.7% 29 558.1 1062.0
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 5 2.6% 1 20.0% 3 37.0 70.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 17 9.0% 3 17.6% 13 87.4 270.6
EXACT PE 1 0.5% 0 0.0% 29 29.0 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 6 3.3% 1 16.7% 2 29.8 62.7
Single 176 96.7% 77 43.8% 12 5071.0 48590.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.8%
SHORT 42.9%
LONG 1.9%
FIELDS 1.1%
PERIODICALS 11.1%
COMMENTS 0.0%
Other 42.1%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.3%
Ten most frequent errors:
1. First word of command is invalid 38.7%
2. NS command - no next screen 21.7%
3. FIND command with invalid index name 15.2%
4. PS command - no previous screen 4.1%
5. DISPLAY command contains invalid word 3.4%
6. Search term missing from search command 3.0%
7. Valid command at an inappropriate time 1.2%
8. DISPLAY command - no FIND results 0.9%
9. 790 0.9%
10. NS of SHOW/EXP command-no next screen 0.6%
11. All others 10.2%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 31.0%
2. GUIDE 20.2%
3. COMMANDS 8.0%
4. FIND 7.0%
5. MAGS DATABASE 6.1%
6. Unrecognized term 4.7%
7. INDEXES 4.2%
8. DISPLAYS (IAC DBS) 2.8%
9. ADDON SEARCH 2.8%
10. MAIL 1.9%
11. All others 11.3%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.2%
2. First word of command is invalid 22.3%
3. FIND command with invalid index name 12.2%
4. DISPLAY command-complete in one screen 6.3%
5. DISPLAY command-first of >1 screen 6.3%
6. DISPLAY command - middle of >1 screen 5.6%
7. FIND command with zero results 4.5%
8. FIND command retrieves 1 book 2.0%
9. FIND command retrieves >1 book 1.9%
10. F/BR command with invalid search term 1.7%
11. All others 14.1%
Ten most frequent SHOW requests:
1. HISTORY 34.8%
2. SEARCH 32.6%
3. IAC NEWS 23.9%
4. SYSTEM NEWS 4.3%
5. SETTINGS (IAC DBS) 2.2%
6. BIBLIOGRAPHIC SOFTWARE 2.2%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)