MELVYL IAC DATABASES TELNET STATISTICS
Time period: 02/02/02 through 02/08/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 99 192 291
Davis 115 2 117
Irvine 37 0 37
Los Angeles 1 41 42
Riverside 6 4 10
San Diego 19 16 35
San Francisco 14 0 14
Santa Barbara 8 19 27
Santa Cruz 11 38 49
LBL 0 2 2
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 1 25 26
Stanford 1
Other-Network UC n/a 79 79
_______ ______ _____
311 421 733
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 23 70 309
2-4 a.m. 9 16 250
4-6 a.m. 2 6 17
6-8 a.m. 10 24 307
8-10 a.m. 92 200 1,844
10-12 a.m. 123 292 2,644
12-2 p.m. 124 260 3,068
2-4 p.m. 159 337 3,520
4-6 p.m. 99 265 1,970
6-8 p.m. 44 132 2,610
8-10 p.m. 22 65 805
10-12 p.m. 26 76 1,063
__________ __________ __________ _________________
Total: 733 1,743 18,407
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 278 417 695
Davis 273 4 277
Irvine 75 0 75
Los Angeles 4 118 122
Riverside 7 11 18
San Diego 27 34 61
San Francisco 53 0 53
Santa Barbara 21 44 65
Santa Cruz 27 87 114
LBL 0 5 5
LLL 0 4 4
Los Alamos n/a 0 0
Other - UC 4 56 60
Stanford 3
Other-Network UC n/a 191 191
_______ ______ _____
769 971 1,743
Number of FIND commands by database
MAGS database 1,569
NEWS database 119
COMP database 55
Total number of FIND commands 1,743
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,708 3,416 7,124
Davis 3,098 28 3,126
Irvine 871 0 871
Los Angeles 20 1,120 1,140
Riverside 12 138 150
San Diego 202 497 699
San Francisco 550 0 550
Santa Barbara 243 280 523
Santa Cruz 178 917 1,095
LBL 0 42 42
LLL 0 101 101
Los Alamos n/a 0 0
Other - UC 11 776 787
Stanford 8
Other-Network UC n/a 2,170 2,170
_______ ______ _____
8,893 9,485 18,386
Number of Records Displayed by database:
MAGS database 16,650
NEWS database 901
COMP database 856
Total number of Records Displayed 18,386
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 89.2%
Percent of NEWS sessions 8.0%
Percent of COMP sessions 2.7%
Percent of searches done in the MAGS database 90.0%
Percent of searches done in the NEWS database 6.8%
Percent of searches done in the COMP database 3.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
Standard deviation in seconds 2.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 4:08
Average session length (minutes:seconds) 10:13
Longest session recorded (minutes:seconds) 244:20
Average number of searches completed per session 2.4
Retrievals per search - median 6.0
Retrievals per search - average 829.5
Retrievals per search - standard deviation 7540.9
Percent of searches completed with 0 results 28.4%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 77.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,485 28.0%
DISPLAY (excluding automatic displays) 1,932 36.5%
HELP 136 2.6%
EXPLAIN 95 1.8%
SET/RESET 251 4.7%
SHOW 27 0.5%
ADD ON (AND, OR, AND NOT) 84 1.6%
LOGON or LOGOFF 842 15.9%
COMMENT 0 0.0%
SAVE 105 2.0%
USE 0 0.0%
OTHER 338 6.4%
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 332 20.9% 99 29.8% 10 51.0 215.1
TITLE WORD 337 21.2% 114 33.8% 11 696.7 4653.9
EXACT TITLE 35 2.2% 11 31.4% 2 4.0 4.1
JOURNAL 80 5.0% 32 40.0% 345 8492.3 17074.1
EXACT JOURNAL 34 2.1% 17 50.0% 653 11932.4 18677.6
SUBJECT 250 15.7% 89 35.6% 27 339.5 1342.7
EXACT SUBJECT 47 3.0% 4 8.5% 8 39.5 119.0
KEYWORD 353 22.2% 81 22.9% 25 1359.1 13975.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 0.4% 0 0.0% 7 9.9 6.7
DATE 34 2.1% 4 11.8% 12 88.1 326.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 62 3.9% 4 6.5% 8 89.4 213.3
EXACT PE 8 0.5% 0 0.0% 6 15.8 18.6
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 9 0.6% 2 22.2% 24 2061.3 5178.2
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 105 7.1% 27 25.7% 7 223.5 1571.1
Single 1,373 92.9% 402 29.3% 17 1226.7 9204.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
SHORT 56.6%
LONG 2.2%
FIELDS 1.0%
PERIODICALS 3.6%
COMMENTS 0.0%
Other 32.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:06
Average session length (minutes:seconds) 14:30
Longest session recorded (minutes:seconds) 138:27
Average number of searches completed per session 2.8
Retrievals per search - median 11.0
Retrievals per search - average 124.9
Retrievals per search - standard deviation 264.7
Percent of searches completed with 0 results 25.5%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 51 22.5%
DISPLAY (excluding automatic displays) 86 37.9%
HELP 11 4.8%
EXPLAIN 12 5.3%
SET/RESET 5 2.2%
SHOW 1 0.4%
ADD ON (AND, OR, AND NOT) 4 1.8%
LOGON or LOGOFF 35 15.4%
COMMENT 0 0.0%
SAVE 12 5.3%
USE 0 0.0%
OTHER 10 4.4%
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 9 16.4% 6 66.7% 2 3.0 1.7
TITLE WORD 8 14.5% 0 0.0% 133 161.1 162.7
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 19 34.5% 5 26.3% 32 79.8 158.1
EXACT SUBJECT 6 10.9% 1 16.7% 941 575.6 500.6
KEYWORD 9 16.4% 3 33.3% 135 260.7 392.3
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 1 1.8% 0 0.0% 111 111.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 5.5% 1 33.3% 13 12.5 9.2
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 7.8% 2 50.0% 82 81.5 41.7
Single 47 92.2% 12 25.5% 44 190.5 314.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
SHORT 62.4%
LONG 0.0%
FIELDS 6.8%
PERIODICALS 1.5%
COMMENTS 0.0%
Other 29.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 408
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 22
displays or when any of these paging options is set.
TEXT included with MAIL commands 76
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:53
Average session length (minutes:seconds) 9:11
Longest session recorded (minutes:seconds) 79:15
Average number of searches completed per session 2.0
Retrievals per search - median 7.0
Retrievals per search - average 11219
Retrievals per search - standard deviation 75198
Percent of searches completed with 0 results 33.9%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 112 32.2%
DISPLAY (excluding automatic displays) 93 26.7%
HELP 12 3.4%
EXPLAIN 10 2.9%
SET/RESET 29 8.3%
SHOW 2 0.6%
ADD ON (AND, OR, AND NOT) 7 2.0%
LOGON or LOGOFF 67 19.3%
COMMENT 0 0.0%
SAVE 2 0.6%
USE 0 0.0%
OTHER 14 4.0%
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 6 4.3% 1 16.7% 10 86.4 169.3
TITLE WORD 32 22.7% 8 25.0% 10 160.6 665.3
EXACT TITLE 1 0.7% 1 100% 0 0.0 0.0
JOURNAL 9 6.4% 3 33.3% 22,937 200628 293574
EXACT JOURNAL 2 1.4% 1 50.0% 389 389.0 0.0
SUBJECT 26 18.4% 12 46.2% 30 585.0 1082.8
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 40 28.4% 16 40.0% 177 1964.0 4359.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 9 6.4% 8 88.9% 1 1.0 0.0
DATE 15 10.6% 5 33.3% 13 107.4 269.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.7% 0 0.0% 4 4.0 0.0
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
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 30 27.0% 15 50.0% 14 100.1 234.3
Single 81 73.0% 25 30.9% 46 22533.0 108256
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.5%
SHORT 46.0%
LONG 2.7%
FIELDS 2.7%
PERIODICALS 2.1%
COMMENTS 0.0%
Other 46.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.8%
Ten most frequent errors:
1. First word of command is invalid 33.0%
2. NS command - no next screen 25.9%
3. FIND command with invalid index name 13.2%
4. DISPLAY command contains invalid word 4.1%
5. PS command - no previous screen 3.1%
6. Search term missing from search command 2.7%
7. Valid command at an inappropriate time 2.6%
8. DISPLAY command - no FIND results 1.8%
9. MAIL command issued w/o email address 1.7%
10. NS of SHOW/EXP command-no next screen 1.3%
11. All others 10.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.1%
2. FIND 15.4%
3. LOCATE (ARTICLE DBS) 13.7%
4. INDEXES 6.8%
5. MAGS DATABASE 5.1%
6. ADDON SEARCH 5.1%
7. COMMANDS 4.3%
8. DISPLAYS (IAC DBS) 4.3%
9. DATABASES 2.6%
10. A014 1.7%
11. All others 17.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.1%
2. First word of command is invalid 20.7%
3. FIND command with invalid index name 9.1%
4. DISPLAY command - middle of >1 screen 6.9%
5. DISPLAY command-first of >1 screen 4.7%
6. NS command - no next screen 4.0%
7. FIND command with zero results 4.0%
8. F/BR command with invalid search term 3.3%
9. FIND command retrieves >1 book 2.5%
10. 3 HELP commands issued from same code 2.2%
11. All others 16.7%
Ten most frequent SHOW requests:
1. HISTORY 43.3%
2. IAC NEWS 30.0%
3. SEARCH 10.0%
4. SETTINGS (IAC DBS) 6.7%
5. UCSF PASSWORDS 3.3%
6. GLOSSARY 3.3%
7. DLA BULLETIN 3.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)