MELVYL IAC DATABASES TELNET STATISTICS
Time period: 10/20/01 through 10/26/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 121 311 432
Davis 165 2 167
Irvine 151 0 151
Los Angeles 2 62 64
Riverside 36 22 58
San Diego 7 28 35
San Francisco 26 0 26
Santa Barbara 13 26 39
Santa Cruz 9 18 27
LBL 0 7 7
LLL 0 0 0
Los Alamos n/a 2 2
Other - UC 4 43 47
Stanford 10
Other-Network UC n/a 92 92
_______ ______ _____
534 613 1,157
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 12 57 219
2-4 a.m. 1 1 21
4-6 a.m. 5 20 118
6-8 a.m. 23 69 365
8-10 a.m. 89 283 2,393
10-12 a.m. 226 694 6,352
12-2 p.m. 231 592 4,927
2-4 p.m. 209 579 6,629
4-6 p.m. 165 500 6,522
6-8 p.m. 82 186 1,602
8-10 p.m. 76 147 1,586
10-12 p.m. 38 106 1,604
__________ __________ __________ _________________
Total: 1,157 3,234 32,338
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 302 722 1,024
Davis 365 4 369
Irvine 657 0 657
Los Angeles 5 236 241
Riverside 127 49 176
San Diego 33 44 77
San Francisco 42 0 42
Santa Barbara 35 72 107
Santa Cruz 43 29 72
LBL 0 22 22
LLL 0 0 0
Los Alamos n/a 6 6
Other - UC 8 146 154
Stanford 20
Other-Network UC n/a 267 267
_______ ______ _____
1,617 1,597 3,234
Number of FIND commands by database
MAGS database 2,860
NEWS database 310
COMP database 64
Total number of FIND commands 3,234
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,429 9,224 11,653
Davis 2,980 2 2,982
Irvine 5,385 0 5,385
Los Angeles 4 3,046 3,050
Riverside 864 397 1,261
San Diego 351 2,187 2,538
San Francisco 788 0 788
Santa Barbara 200 553 753
Santa Cruz 203 527 730
LBL 0 260 260
LLL 0 0 0
Los Alamos n/a 17 17
Other - UC 3 656 659
Stanford 42
Other-Network UC n/a 1,955 1,955
_______ ______ _____
13,207 18,824 32,073
Number of Records Displayed by database:
MAGS database 28,662
NEWS database 3,304
COMP database 372
Total number of Records Displayed 32,073
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 84.7%
Percent of NEWS sessions 12.1%
Percent of COMP sessions 3.2%
Percent of searches done in the MAGS database 88.4%
Percent of searches done in the NEWS database 9.6%
Percent of searches done in the COMP database 2.0%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.1
Standard deviation in seconds 7.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 7.1
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:04
Average session length (minutes:seconds) 13:35
Longest session recorded (minutes:seconds) 465:53
Average number of searches completed per session 2.9
Retrievals per search - median 4.0
Retrievals per search - average 649.4
Retrievals per search - standard deviation 4944.1
Percent of searches completed with 0 results 31.3%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 55.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,626 28.8%
DISPLAY (excluding automatic displays) 3,382 37.1%
HELP 316 3.5%
EXPLAIN 215 2.4%
SET/RESET 408 4.5%
SHOW 39 0.4%
ADD ON (AND, OR, AND NOT) 234 2.6%
LOGON or LOGOFF 1,264 13.9%
COMMENT 0 0.0%
SAVE 137 1.5%
USE 2 0.0%
OTHER 501 5.5%
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 436 15.8% 113 25.9% 11 65.6 288.7
TITLE WORD 694 25.2% 215 31.0% 10 433.0 2557.1
EXACT TITLE 120 4.4% 48 40.0% 1 12.1 68.0
JOURNAL 161 5.8% 88 54.7% 2,009 5516.1 10649.9
EXACT JOURNAL 132 4.8% 72 54.5% 653 4980.5 14440.5
SUBJECT 608 22.1% 231 38.0% 29 385.4 1689.3
EXACT SUBJECT 21 0.8% 5 23.8% 11 162.3 526.4
KEYWORD 429 15.6% 80 18.6% 37 2012.0 10636.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.0% 0 0.0% 31,320 31320.0 0.0
DATE 55 2.0% 11 20.0% 26 376.7 792.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 25 0.9% 3 12.0% 6 42.0 125.2
EXACT PE 67 2.4% 11 16.4% 3 9.4 21.3
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 7 0.3% 0 0.0% 158 508.4 812.7
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 150 5.8% 62 41.3% 6 200.6 587.3
Single 2,452 94.2% 753 30.7% 18 1058.6 6346.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 60.4%
LONG 2.0%
FIELDS 1.0%
PERIODICALS 1.9%
COMMENTS 0.0%
Other 32.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:38
Average session length (minutes:seconds) 9:28
Longest session recorded (minutes:seconds) 56:33
Average number of searches completed per session 1.7
Retrievals per search - median 1.0
Retrievals per search - average 261.4
Retrievals per search - standard deviation 1099.3
Percent of searches completed with 0 results 42.2%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 63 29.7%
DISPLAY (excluding automatic displays) 60 28.3%
HELP 6 2.8%
EXPLAIN 7 3.3%
SET/RESET 19 9.0%
SHOW 5 2.4%
ADD ON (AND, OR, AND NOT) 1 0.5%
LOGON or LOGOFF 40 18.9%
COMMENT 0 0.0%
SAVE 3 1.4%
USE 0 0.0%
OTHER 8 3.8%
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 15 22.7% 10 66.7% 1 157.8 350.1
TITLE WORD 24 36.4% 7 29.2% 11 32.0 52.5
EXACT TITLE 2 3.0% 2 100% 0 0.0 0.0
JOURNAL 5 7.6% 5 100% 0 0.0 0.0
EXACT JOURNAL 2 3.0% 2 100% 0 0.0 0.0
SUBJECT 3 4.5% 2 66.7% 4,508 4508.0 0.0
EXACT SUBJECT 1 1.5% 1 100% 0 0.0 0.0
KEYWORD 11 16.7% 0 0.0% 122 984.9 2209.9
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 1.5% 1 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 3.0% 0 0.0% 19 19.0 25.5
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 3 4.8% 3 100% 0 0.0 0.0
Single 60 95.2% 24 40.0% 18 464.3 1441.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.0%
SHORT 51.8%
LONG 0.0%
FIELDS 6.3%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 32.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 671
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 19
displays or when any of these paging options is set.
TEXT included with MAIL commands 148
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:01
Average session length (minutes:seconds) 8:35
Longest session recorded (minutes:seconds) 66:28
Average number of searches completed per session 2.2
Retrievals per search - median 1.0
Retrievals per search - average 2377.7
Retrievals per search - standard deviation 32085
Percent of searches completed with 0 results 38.7%
Percent of searches entered that are long 2.9%
Percent of long searches completed
(includes partial results) 44.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 291 37.1%
DISPLAY (excluding automatic displays) 160 20.4%
HELP 31 4.0%
EXPLAIN 17 2.2%
SET/RESET 78 9.9%
SHOW 10 1.3%
ADD ON (AND, OR, AND NOT) 19 2.4%
LOGON or LOGOFF 144 18.4%
COMMENT 0 0.0%
SAVE 5 0.6%
USE 0 0.0%
OTHER 29 3.7%
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 32 10.5% 13 40.6% 23 159.7 320.5
TITLE WORD 87 28.5% 28 32.2% 7 686.4 3327.8
EXACT TITLE 25 8.2% 18 72.0% 5 59.4 142.4
JOURNAL 5 1.6% 1 20.0% 34 138883 277707
EXACT JOURNAL 7 2.3% 3 42.9% 124 10863.5 21557.1
SUBJECT 76 24.9% 43 56.6% 15 224.6 475.3
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 51 16.7% 12 23.5% 21 376.0 992.2
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 9 3.0% 3 33.3% 4 42.7 74.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 7 2.3% 1 14.3% 4 26.3 57.2
EXACT PE 6 2.0% 1 16.7% 1 7.6 11.3
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 19 6.6% 7 36.8% 11 30.5 53.0
Single 267 93.4% 109 40.8% 10 4207.1 44314.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.5%
SHORT 43.2%
LONG 2.2%
FIELDS 0.5%
PERIODICALS 3.5%
COMMENTS 0.0%
Other 45.2%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.2%
Ten most frequent errors:
1. First word of command is invalid 36.6%
2. NS command - no next screen 21.6%
3. FIND command with invalid index name 14.7%
4. PS command - no previous screen 4.3%
5. Valid command at an inappropriate time 4.1%
6. DISPLAY command contains invalid word 2.6%
7. Search term missing from search command 2.5%
8. MAIL command issued w/o email address 1.3%
9. DISPLAY command - no FIND results 0.9%
10. SHOW command contains invalid word 0.8%
11. All others 10.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 26.8%
2. LOCATE (ARTICLE DBS) 18.0%
3. FIND 8.8%
4. MAGS DATABASE 6.7%
5. COMMANDS 6.3%
6. INDEXES 5.4%
7. Unrecognized term 3.3%
8. ADDON SEARCH 2.5%
9. DATABASES 2.1%
10. DISPLAYS (IAC DBS) 1.7%
11. All others 18.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.3%
2. First word of command is invalid 21.8%
3. FIND command with invalid index name 12.7%
4. DISPLAY command-complete in one screen 5.2%
5. FIND command with zero results 4.6%
6. DISPLAY command-first of >1 screen 4.4%
7. FIND command retrieves >1 book 3.9%
8. DISPLAY command - middle of >1 screen 3.9%
9. Valid command at an inappropriate time 2.0%
10. PS command - no previous screen 1.9%
11. All others 15.4%
Ten most frequent SHOW requests:
1. HISTORY 32.7%
2. IAC NEWS 30.8%
3. SEARCH 19.2%
4. TIMEOUT SETTING 7.7%
5. Z39.50 NEWS 1.9%
6. GLOSSARY 1.9%
7. TIME 1.9%
8. MAIL SETTINGS 1.9%
9. MAIL STATUS 1.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)