MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/23/01 through 06/29/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 63 211 274
Davis 93 4 97
Irvine 60 0 60
Los Angeles 0 48 48
Riverside 25 2 27
San Diego 5 39 44
San Francisco 17 0 17
Santa Barbara 15 21 36
Santa Cruz 15 17 32
LBL 0 13 13
LLL 0 5 5
Los Alamos n/a 0 0
Other - UC 0 18 18
Stanford 23
Other-Network UC n/a 102 102
_______ ______ _____
293 480 796
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 19 51 355
2-4 a.m. 5 23 322
4-6 a.m. 3 14 523
6-8 a.m. 14 24 479
8-10 a.m. 87 208 2,442
10-12 a.m. 190 448 9,543
12-2 p.m. 163 451 6,603
2-4 p.m. 146 436 6,173
4-6 p.m. 99 295 3,991
6-8 p.m. 24 84 6,392
8-10 p.m. 23 62 15,137
10-12 p.m. 23 90 1,297
__________ __________ __________ _________________
Total: 796 2,186 53,257
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 190 564 754
Davis 219 5 224
Irvine 105 0 105
Los Angeles 0 105 105
Riverside 96 4 100
San Diego 5 109 114
San Francisco 23 0 23
Santa Barbara 23 97 120
Santa Cruz 94 84 178
LBL 0 33 33
LLL 0 31 31
Los Alamos n/a 0 0
Other - UC 0 66 66
Stanford 62
Other-Network UC n/a 271 271
_______ ______ _____
755 1,369 2,186
Number of FIND commands by database
MAGS database 1,947
NEWS database 101
COMP database 138
Total number of FIND commands 2,186
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,684 6,447 9,131
Davis 1,559 49 1,608
Irvine 930 0 930
Los Angeles 0 3,542 3,542
Riverside 1,939 16 1,955
San Diego 101 25,665 25,766
San Francisco 262 0 262
Santa Barbara 116 539 655
Santa Cruz 467 1,851 2,318
LBL 0 362 362
LLL 0 209 209
Los Alamos n/a 0 0
Other - UC 0 765 765
Stanford 125
Other-Network UC n/a 5,143 5,143
_______ ______ _____
8,058 44,588 52,771
Number of Records Displayed by database:
MAGS database 40,406
NEWS database 1,089
COMP database 11,762
Total number of Records Displayed 52,771
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.6%
Percent of NEWS sessions 7.8%
Percent of COMP sessions 6.7%
Percent of searches done in the MAGS database 89.1%
Percent of searches done in the NEWS database 4.6%
Percent of searches done in the COMP database 6.3%
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 2.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:01
Average session length (minutes:seconds) 13:36
Longest session recorded (minutes:seconds) 276:45
Average number of searches completed per session 2.8
Retrievals per search - median 7.0
Retrievals per search - average 793.8
Retrievals per search - standard deviation 4961.8
Percent of searches completed with 0 results 26.5%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 72.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,773 27.8%
DISPLAY (excluding automatic displays) 2,637 41.3%
HELP 106 1.7%
EXPLAIN 90 1.4%
SET/RESET 300 4.7%
SHOW 16 0.3%
ADD ON (AND, OR, AND NOT) 174 2.7%
LOGON or LOGOFF 828 13.0%
COMMENT 0 0.0%
SAVE 103 1.6%
USE 4 0.1%
OTHER 357 5.6%
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 381 20.5% 104 27.3% 9 88.9 308.8
TITLE WORD 434 23.3% 143 32.9% 11 314.7 1456.8
EXACT TITLE 90 4.8% 37 41.1% 6 260.5 1040.1
JOURNAL 69 3.7% 24 34.8% 2,626 9702.0 21584.1
EXACT JOURNAL 95 5.1% 38 40.0% 2,464 8567.6 12333.1
SUBJECT 301 16.2% 90 29.9% 25 490.8 1344.1
EXACT SUBJECT 6 0.3% 1 16.7% 2,035 2678.0 2276.7
KEYWORD 343 18.4% 53 15.5% 46 797.5 3161.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 0.4% 3 42.9% 8 9.0 4.3
DATE 18 1.0% 6 33.3% 45 96.5 112.8
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 34 1.8% 5 14.7% 5 44.7 90.4
EXACT PE 22 1.2% 3 13.6% 10 103.9 299.0
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 59 3.2% 6 10.2% 1,392 3982.8 11789.7
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 93 5.3% 30 32.3% 51 1642.0 3585.7
Single 1,670 94.7% 451 27.0% 19 1158.0 6160.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
SHORT 61.2%
LONG 1.9%
FIELDS 1.3%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 30.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 9:01
Average session length (minutes:seconds) 9:51
Longest session recorded (minutes:seconds) 32:09
Average number of searches completed per session 2.6
Retrievals per search - median 22.0
Retrievals per search - average 714.8
Retrievals per search - standard deviation 3745.5
Percent of searches completed with 0 results 24.6%
Percent of searches entered that are long 2.9%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 124 27.6%
DISPLAY (excluding automatic displays) 176 39.1%
HELP 1 0.2%
EXPLAIN 2 0.4%
SET/RESET 23 5.1%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 14 3.1%
LOGON or LOGOFF 72 16.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 38 8.4%
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 16 12.0% 12 75.0% 7 8.3 7.5
TITLE WORD 17 12.8% 10 58.8% 18 62.7 91.1
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 7 5.3% 1 14.3% 417 7218.0 16834.9
EXACT JOURNAL 1 0.8% 1 100% 0 0.0 0.0
SUBJECT 6 4.5% 2 33.3% 447 736.5 922.8
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 65 48.9% 5 7.7% 158 851.6 1906.2
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 5 3.8% 0 0.0% 67 67.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 7 5.3% 0 0.0% 2 20.4 47.9
EXACT PE 5 3.8% 0 0.0% 11 13.6 13.8
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 4 3.0% 0 0.0% 39 37.0 34.7
By number of indexes:
Multiple 9 7.3% 1 11.1% 67 45.9 29.4
Single 115 92.7% 29 25.2% 88 1137.0 4704.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.0%
SHORT 51.4%
LONG 0.0%
FIELDS 0.7%
PERIODICALS 6.9%
COMMENTS 0.0%
Other 37.0%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 634
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 42
displays or when any of these paging options is set.
TEXT included with MAIL commands 138
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:19
Average session length (minutes:seconds) 8:26
Longest session recorded (minutes:seconds) 29:25
Average number of searches completed per session 1.6
Retrievals per search - median 6.5
Retrievals per search - average 369.1
Retrievals per search - standard deviation 2613.9
Percent of searches completed with 0 results 30.0%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 96 31.6%
DISPLAY (excluding automatic displays) 66 21.7%
HELP 12 3.9%
EXPLAIN 9 3.0%
SET/RESET 24 7.9%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 5 1.6%
LOGON or LOGOFF 79 26.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 12 3.9%
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 8 8.1% 3 37.5% 19 552.4 1209.5
TITLE WORD 35 35.4% 11 31.4% 45 1212.0 5288.9
EXACT TITLE 3 3.0% 1 33.3% 93 93.0 91.9
JOURNAL 3 3.0% 1 33.3% 202 201.5 283.5
EXACT JOURNAL 1 1.0% 1 100% 0 0.0 0.0
SUBJECT 11 11.1% 5 45.5% 110 370.0 703.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 35 35.4% 8 22.9% 12 62.1 97.0
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 2 2.0% 1 50.0% 47 47.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 1 1.0% 0 0.0% 147 147.0 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 3 3.1% 1 33.3% 225 224.5 251.0
Single 93 96.9% 29 31.2% 21 556.8 3260.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.1%
SHORT 43.9%
LONG 2.7%
FIELDS 0.0%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 45.9%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.5%
Ten most frequent errors:
1. NS command - no next screen 33.4%
2. First word of command is invalid 32.6%
3. FIND command with invalid index name 10.7%
4. PS command - no previous screen 4.2%
5. DISPLAY command contains invalid word 3.0%
6. Valid command at an inappropriate time 2.9%
7. Search term missing from search command 1.3%
8. Add-on search, no index name after verb 1.2%
9. Index invalid in current database 1.0%
10. Command contains escape or arrow key 1.0%
11. All others 8.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 36.6%
2. LOCATE (ARTICLE DBS) 13.9%
3. FIND 8.9%
4. INDEXES 6.9%
5. ADDON SEARCH 5.9%
6. MAGS DATABASE 5.0%
7. COMMANDS 4.0%
8. Unrecognized term 4.0%
9. MAIL 3.0%
10. DATABASES 3.0%
11. All others 8.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.3%
2. First word of command is invalid 18.6%
3. FIND command with invalid index name 9.1%
4. DISPLAY command-first of >1 screen 9.1%
5. FIND command with zero results 7.3%
6. DISPLAY command - middle of >1 screen 5.5%
7. DISPLAY command-complete in one screen 5.0%
8. FIND command retrieves >1 book 2.7%
9. MAIL command entered w/o email address 2.7%
10. NS command - no next screen 2.3%
11. All others 10.5%
Ten most frequent SHOW requests:
1. MAIL STATUS 47.1%
2. SEARCH 23.5%
3. HISTORY 23.5%
4. SYSTEM NEWS 5.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)